90729657255650 has 48 divisors (see below), whose sum is σ = 197569361001600. Its totient is φ = 30348596150400.

The previous prime is 90729657255631. The next prime is 90729657255667. The reversal of 90729657255650 is 5655275692709.

It is a happy number.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3161297750 + ... + 3161326449.

It is an arithmetic number, because the mean of its divisors is an integer number (4116028354200).

Almost surely, 2^{90729657255650} is an apocalyptic number.

90729657255650 is an abundant number, since it is smaller than the sum of its proper divisors (106839703745950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90729657255650 is a wasteful number, since it uses less digits than its factorization.

90729657255650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322624259 (or 6322624254 counting only the distinct ones).

The product of its (nonzero) digits is 357210000, while the sum is 68.

The spelling of 90729657255650 in words is "ninety trillion, seven hundred twenty-nine billion, six hundred fifty-seven million, two hundred fifty-five thousand, six hundred fifty".