90642972922 has 4 divisors (see below), whose sum is σ = 135964459386. Its totient is φ = 45321486460.

The previous prime is 90642972919. The next prime is 90642972967. The reversal of 90642972922 is 22927924609.

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

It can be written as a sum of positive squares in only one way, i.e., 87763470001 + 2879502921 = 296249^2 + 53661^2 .

It is a super-2 number, since 2×90642972922² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90642972922.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22660743229 + ... + 22660743232.

Almost surely, 2^90642972922 is an apocalyptic number.

90642972922 is a deficient number, since it is larger than the sum of its proper divisors (45321486464).

90642972922 is a wasteful number, since it uses less digits than its factorization.

90642972922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45321486463.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 90642972922 in words is "ninety billion, six hundred forty-two million, nine hundred seventy-two thousand, nine hundred twenty-two".