102690838644 has 24 divisors (see below), whose sum is σ = 240950576160. Its totient is φ = 34039048224.

The previous prime is 102690838619. The next prime is 102690838681. The reversal of 102690838644 is 446838096201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23901679 + ... + 23905974.

It is an arithmetic number, because the mean of its divisors is an integer number (10039607340).

Almost surely, 2^102690838644 is an apocalyptic number.

It is an amenable number.

102690838644 is an abundant number, since it is smaller than the sum of its proper divisors (138259737516).

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

102690838644 is a wasteful number, since it uses less digits than its factorization.

102690838644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47807839 (or 47807837 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 102690838644 in words is "one hundred two billion, six hundred ninety million, eight hundred thirty-eight thousand, six hundred forty-four".