100105150601581 has 4 divisors (see below), whose sum is σ = 100105202598172. Its totient is φ = 100105098604992.

The previous prime is 100105150601527. The next prime is 100105150601623. The reversal of 100105150601581 is 185106051501001.

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 60676170039081 + 39428980562500 = 7789491^2 + 6279250^2 .

It is a cyclic number.

It is not a de Polignac number, because 100105150601581 - 2⁷ = 100105150601453 is a prime.

It is a super-2 number, since 2×100105150601581² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100105154601581) 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, 22994796 + ... + 26999461.

It is an arithmetic number, because the mean of its divisors is an integer number (25026300649543).

Almost surely, 2^{100105150601581} is an apocalyptic number.

It is an amenable number.

100105150601581 is a deficient number, since it is larger than the sum of its proper divisors (51996591).

100105150601581 is an equidigital number, since it uses as much as digits as its factorization.

100105150601581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51996590.

The product of its (nonzero) digits is 6000, while the sum is 34.

The spelling of 100105150601581 in words is "one hundred trillion, one hundred five billion, one hundred fifty million, six hundred one thousand, five hundred eighty-one".