90978821062 has 8 divisors (see below), whose sum is σ = 136482608592. Its totient is φ = 45484618200.

The previous prime is 90978821033. The next prime is 90978821077. The reversal of 90978821062 is 26012887909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2372389 + ... + 2410432.

It is an arithmetic number, because the mean of its divisors is an integer number (17060326074).

Almost surely, 2^90978821062 is an apocalyptic number.

90978821062 is a deficient number, since it is larger than the sum of its proper divisors (45503787530).

90978821062 is a wasteful number, since it uses less digits than its factorization.

90978821062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792334.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 90978821062 in words is "ninety billion, nine hundred seventy-eight million, eight hundred twenty-one thousand, sixty-two".