102639499876 has 27 divisors (see below), whose sum is σ = 184154065977. Its totient is φ = 50055233760.

The previous prime is 102639499847. The next prime is 102639499883. The reversal of 102639499876 is 678994936201.

The square root of 102639499876 is 320374.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4945746276 + 97693753600 = 70326^2 + 312560^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26268715 + ... + 26272621.

Almost surely, 2^102639499876 is an apocalyptic number.

102639499876 is the 320374-th square number.

It is an amenable number.

102639499876 is a deficient number, since it is larger than the sum of its proper divisors (81514566101).

102639499876 is an frugal number, since it uses more digits than its factorization.

102639499876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 64.

Multiplying 102639499876 by its sum of digits (64), we get a square (6568927992064 = 2562992²).

The spelling of 102639499876 in words is "one hundred two billion, six hundred thirty-nine million, four hundred ninety-nine thousand, eight hundred seventy-six".