90722042401 has 9 divisors (see below), whose sum is σ = 91084016401. Its totient is φ = 90361504804.

The previous prime is 90722042363. The next prime is 90722042413. The reversal of 90722042401 is 10424022709.

The square root of 90722042401 is 301201.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 90722042401 - 2⁷ = 90722042273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90722042471) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 108130740 + ... + 108131578.

Almost surely, 2^90722042401 is an apocalyptic number.

90722042401 is the 301201-st square number.

90722042401 is the 150601-st centered octagonal number.

It is an amenable number.

90722042401 is a deficient number, since it is larger than the sum of its proper divisors (361974000).

90722042401 is an frugal number, since it uses more digits than its factorization.

90722042401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 90722042401 in words is "ninety billion, seven hundred twenty-two million, forty-two thousand, four hundred one".