99977522401 has 4 divisors (see below), whose sum is σ = 99985984704. Its totient is φ = 99969060100.

The previous prime is 99977522357. The next prime is 99977522419. The reversal of 99977522401 is 10422577999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99977522401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99977522441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4213405 + ... + 4237066.

It is an arithmetic number, because the mean of its divisors is an integer number (24996496176).

Almost surely, 2^99977522401 is an apocalyptic number.

It is an amenable number.

99977522401 is a deficient number, since it is larger than the sum of its proper divisors (8462303).

99977522401 is a wasteful number, since it uses less digits than its factorization.

99977522401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8462302.

The product of its (nonzero) digits is 2857680, while the sum is 55.

The spelling of 99977522401 in words is "ninety-nine billion, nine hundred seventy-seven million, five hundred twenty-two thousand, four hundred one".