77189520099 has 32 divisors (see below), whose sum is σ = 108650790400. Its totient is φ = 48609953280.

The previous prime is 77189520071. The next prime is 77189520157. The reversal of 77189520099 is 99002598177.

It is not a de Polignac number, because 77189520099 - 2¹² = 77189516003 is a prime.

It is a super-2 number, since 2×77189520099² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77189520019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42156114 + ... + 42157944.

It is an arithmetic number, because the mean of its divisors is an integer number (3395337200).

Almost surely, 2^77189520099 is an apocalyptic number.

77189520099 is a deficient number, since it is larger than the sum of its proper divisors (31461270301).

77189520099 is a wasteful number, since it uses less digits than its factorization.

77189520099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595.

The product of its (nonzero) digits is 2857680, while the sum is 57.

The spelling of 77189520099 in words is "seventy-seven billion, one hundred eighty-nine million, five hundred twenty thousand, ninety-nine".