90935852721 has 96 divisors (see below), whose sum is σ = 149163568128. Its totient is φ = 49037788800.

The previous prime is 90935852681. The next prime is 90935852741. The reversal of 90935852721 is 12725853909.

It is not a de Polignac number, because 90935852721 - 2¹⁴ = 90935836337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90935852741) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 86522646 + ... + 86523696.

It is an arithmetic number, because the mean of its divisors is an integer number (1553787168).

Almost surely, 2^90935852721 is an apocalyptic number.

It is an amenable number.

90935852721 is a deficient number, since it is larger than the sum of its proper divisors (58227715407).

90935852721 is a wasteful number, since it uses less digits than its factorization.

90935852721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 90935852721 in words is "ninety billion, nine hundred thirty-five million, eight hundred fifty-two thousand, seven hundred twenty-one".