138857766245952 has 56 divisors (see below), whose sum is σ = 395655622419456. Its totient is φ = 42725466536448.

The previous prime is 138857766245929. The next prime is 138857766245981. The reversal of 138857766245952 is 259542667758831.

It is a Harshad number since it is a multiple of its sum of digits (78).

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, 27816056448 + ... + 27816061439.

It is an arithmetic number, because the mean of its divisors is an integer number (7065278971776).

Almost surely, 2^{138857766245952} is an apocalyptic number.

138857766245952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138857766245952 is an abundant number, since it is smaller than the sum of its proper divisors (256797856173504).

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

138857766245952 is a wasteful number, since it uses less digits than its factorization.

138857766245952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55632117915 (or 55632117905 counting only the distinct ones).

The product of its digits is 6096384000, while the sum is 78.

The spelling of 138857766245952 in words is "one hundred thirty-eight trillion, eight hundred fifty-seven billion, seven hundred sixty-six million, two hundred forty-five thousand, nine hundred fifty-two".