102156683444 has 6 divisors (see below), whose sum is σ = 178774196034. Its totient is φ = 51078341720.

The previous prime is 102156683437. The next prime is 102156683477. The reversal of 102156683444 is 444386651201.

It can be written as a sum of positive squares in only one way, i.e., 61807926544 + 40348756900 = 248612^2 + 200870^2 .

It is a super-2 number, since 2×102156683444² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102156683395 and 102156683404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12769585427 + ... + 12769585434.

It is an arithmetic number, because the mean of its divisors is an integer number (29795699339).

Almost surely, 2^102156683444 is an apocalyptic number.

It is an amenable number.

102156683444 is a deficient number, since it is larger than the sum of its proper divisors (76617512590).

102156683444 is a wasteful number, since it uses less digits than its factorization.

102156683444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25539170865 (or 25539170863 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 102156683444 in words is "one hundred two billion, one hundred fifty-six million, six hundred eighty-three thousand, four hundred forty-four".