138857461888707 has 20 divisors (see below), whose sum is σ = 207429672745680. Its totient is φ = 92571362450064.

The previous prime is 138857461888703. The next prime is 138857461888723. The reversal of 138857461888707 is 707888164758831.

138857461888707 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 5 + 7 + 461 + 8 + 88 + 70 + 7 = 666.

138857461888707 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138857461888707 - 2² = 138857461888703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (138857461888703) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26486469 + ... + 31292937.

It is an arithmetic number, because the mean of its divisors is an integer number (10371483637284).

Almost surely, 2^{138857461888707} is an apocalyptic number.

138857461888707 is a deficient number, since it is larger than the sum of its proper divisors (68572210856973).

138857461888707 is an equidigital number, since it uses as much as digits as its factorization.

138857461888707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163144 (or 5163135 counting only the distinct ones).

The product of its (nonzero) digits is 4046192640, while the sum is 81.

The spelling of 138857461888707 in words is "one hundred thirty-eight trillion, eight hundred fifty-seven billion, four hundred sixty-one million, eight hundred eighty-eight thousand, seven hundred seven".