102620512878 has 16 divisors (see below), whose sum is σ = 221028797136. Its totient is φ = 31575542400.

The previous prime is 102620512859. The next prime is 102620512889. The reversal of 102620512878 is 878215026201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657823723 + ... + 657823878.

It is an arithmetic number, because the mean of its divisors is an integer number (13814299821).

Almost surely, 2^102620512878 is an apocalyptic number.

102620512878 is an abundant number, since it is smaller than the sum of its proper divisors (118408284258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102620512878 is a wasteful number, since it uses less digits than its factorization.

102620512878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315647619.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 102620512878 in words is "one hundred two billion, six hundred twenty million, five hundred twelve thousand, eight hundred seventy-eight".