90725805105 has 32 divisors (see below), whose sum is σ = 165523284864. Its totient is φ = 42037656576.

The previous prime is 90725805091. The next prime is 90725805151. The reversal of 90725805105 is 50150852709.

It is not a de Polignac number, because 90725805105 - 2⁸ = 90725804849 is a prime.

It is a super-2 number, since 2×90725805105² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13680819 + ... + 13687448.

It is an arithmetic number, because the mean of its divisors is an integer number (5172602652).

Almost surely, 2^90725805105 is an apocalyptic number.

It is an amenable number.

90725805105 is a deficient number, since it is larger than the sum of its proper divisors (74797479759).

90725805105 is a wasteful number, since it uses less digits than its factorization.

90725805105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27368305.

The product of its (nonzero) digits is 126000, while the sum is 42.

The spelling of 90725805105 in words is "ninety billion, seven hundred twenty-five million, eight hundred five thousand, one hundred five".