90887937851 has 4 divisors (see below), whose sum is σ = 90908726112. Its totient is φ = 90867149592.

The previous prime is 90887937841. The next prime is 90887937869. The reversal of 90887937851 is 15873978809.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90887937851 - 2³⁴ = 73708068667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90887937841) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10387571 + ... + 10396316.

It is an arithmetic number, because the mean of its divisors is an integer number (22727181528).

Almost surely, 2^90887937851 is an apocalyptic number.

90887937851 is a deficient number, since it is larger than the sum of its proper divisors (20788261).

90887937851 is a wasteful number, since it uses less digits than its factorization.

90887937851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20788260.

The product of its (nonzero) digits is 30481920, while the sum is 65.

The spelling of 90887937851 in words is "ninety billion, eight hundred eighty-seven million, nine hundred thirty-seven thousand, eight hundred fifty-one".