100135164781 has 4 divisors (see below), whose sum is σ = 100140083964. Its totient is φ = 100130245600.

The previous prime is 100135164739. The next prime is 100135164803. The reversal of 100135164781 is 187461531001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187461531001 = 9791 ⋅19146311.

It can be written as a sum of positive squares in 2 ways, for example, as 93569303881 + 6565860900 = 305891^2 + 81030^2 .

It is a cyclic number.

It is not a de Polignac number, because 100135164781 - 2¹¹ = 100135162733 is a prime.

It is a super-2 number, since 2×100135164781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100135164781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100135164721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2428930 + ... + 2469811.

It is an arithmetic number, because the mean of its divisors is an integer number (25035020991).

Almost surely, 2^100135164781 is an apocalyptic number.

It is an amenable number.

100135164781 is a deficient number, since it is larger than the sum of its proper divisors (4919183).

100135164781 is an equidigital number, since it uses as much as digits as its factorization.

100135164781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919182.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 100135164781 its reverse (187461531001), we get a palindrome (287596695782).

The spelling of 100135164781 in words is "one hundred billion, one hundred thirty-five million, one hundred sixty-four thousand, seven hundred eighty-one".