139657768079778 has 24 divisors (see below), whose sum is σ = 325868125520028. Its totient is φ = 42971620947552.

The previous prime is 139657768079717. The next prime is 139657768079779. The reversal of 139657768079778 is 877970867756931.

139657768079778 is a `hidden beast` number, since 1 + 396 + 5 + 7 + 7 + 6 + 80 + 79 + 7 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 137637313363449 + 2020454716329 = 11731893^2 + 1421427^2 .

It is not an unprimeable number, because it can be changed into a prime (139657768079779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298414034125 + ... + 298414034592.

Almost surely, 2^{139657768079778} is an apocalyptic number.

139657768079778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139657768079778 is an abundant number, since it is smaller than the sum of its proper divisors (186210357440250).

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

139657768079778 is a wasteful number, since it uses less digits than its factorization.

139657768079778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596828068738 (or 596828068735 counting only the distinct ones).

The product of its (nonzero) digits is 47048843520, while the sum is 90.

The spelling of 139657768079778 in words is "one hundred thirty-nine trillion, six hundred fifty-seven billion, seven hundred sixty-eight million, seventy-nine thousand, seven hundred seventy-eight".