877579975778 has 32 divisors (see below), whose sum is σ = 1469766608640. Its totient is φ = 389535647760.

The previous prime is 877579975771. The next prime is 877579975807.

877579975778 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×877579975778² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (86).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 877579975778.

It is not an unprimeable number, because it can be changed into a prime (877579975771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4199453 + ... + 4403471.

It is an arithmetic number, because the mean of its divisors is an integer number (45930206520).

Almost surely, 2^877579975778 is an apocalyptic number.

877579975778 is a deficient number, since it is larger than the sum of its proper divisors (592186632862).

877579975778 is a wasteful number, since it uses less digits than its factorization.

877579975778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208622.

The product of its digits is 15247310400, while the sum is 86.

The spelling of 877579975778 in words is "eight hundred seventy-seven billion, five hundred seventy-nine million, nine hundred seventy-five thousand, seven hundred seventy-eight".