99077521786 has 4 divisors (see below), whose sum is σ = 148616282682. Its totient is φ = 49538760892.

The previous prime is 99077521757. The next prime is 99077521811. The reversal of 99077521786 is 68712577099.

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., 98961205561 + 116316225 = 314581^2 + 10785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24769380445 + ... + 24769380448.

Almost surely, 2^99077521786 is an apocalyptic number.

99077521786 is a deficient number, since it is larger than the sum of its proper divisors (49538760896).

99077521786 is a wasteful number, since it uses less digits than its factorization.

99077521786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49538760895.

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 99077521786 in words is "ninety-nine billion, seventy-seven million, five hundred twenty-one thousand, seven hundred eighty-six".