100781403681037 has 4 divisors (see below), whose sum is σ = 100782765353116. Its totient is φ = 100780042008960.

The previous prime is 100781403681029. The next prime is 100781403681067. The reversal of 100781403681037 is 730186304187001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86120423051881 + 14660980629156 = 9280109^2 + 3828966^2 .

It is a cyclic number.

It is not a de Polignac number, because 100781403681037 - 2³ = 100781403681029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100781403681067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680725014 + ... + 680873047.

It is an arithmetic number, because the mean of its divisors is an integer number (25195691338279).

Almost surely, 2^{100781403681037} is an apocalyptic number.

It is an amenable number.

100781403681037 is a deficient number, since it is larger than the sum of its proper divisors (1361672079).

100781403681037 is an equidigital number, since it uses as much as digits as its factorization.

100781403681037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361672078.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 100781403681037 in words is "one hundred trillion, seven hundred eighty-one billion, four hundred three million, six hundred eighty-one thousand, thirty-seven".