2157814636139 has 2 divisors, whose sum is σ = 2157814636140. Its totient is φ = 2157814636138.

The previous prime is 2157814636127. The next prime is 2157814636147. The reversal of 2157814636139 is 9316364187512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157814636139 - 2²⁰ = 2157813587563 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157814636199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078907318069 + 1078907318070.

It is an arithmetic number, because the mean of its divisors is an integer number (1078907318070).

Almost surely, 2^{2157814636139} is an apocalyptic number.

2157814636139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157814636139 is an equidigital number, since it uses as much as digits as its factorization.

2157814636139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 2157814636139 in words is "two trillion, one hundred fifty-seven billion, eight hundred fourteen million, six hundred thirty-six thousand, one hundred thirty-nine".