90155694907 has 16 divisors (see below), whose sum is σ = 96040382400. Its totient is φ = 84336519168.

The previous prime is 90155694869. The next prime is 90155694983. The reversal of 90155694907 is 70949655109.

It is a cyclic number.

It is not a de Polignac number, because 90155694907 - 2²³ = 90147306299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90155694007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3291553 + ... + 3318829.

It is an arithmetic number, because the mean of its divisors is an integer number (6002523900).

Almost surely, 2^90155694907 is an apocalyptic number.

90155694907 is a deficient number, since it is larger than the sum of its proper divisors (5884687493).

90155694907 is a wasteful number, since it uses less digits than its factorization.

90155694907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28470.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 90155694907 in words is "ninety billion, one hundred fifty-five million, six hundred ninety-four thousand, nine hundred seven".