158642577857 has 2 divisors, whose sum is σ = 158642577858. Its totient is φ = 158642577856.

The previous prime is 158642577757. The next prime is 158642577869. The reversal of 158642577857 is 758775246851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158492368321 + 150209536 = 398111^2 + 12256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158642577857 is a prime.

It is a super-2 number, since 2×158642577857² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 158642577793 and 158642577802.

It is not a weakly prime, because it can be changed into another prime (158642577157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79321288928 + 79321288929.

It is an arithmetic number, because the mean of its divisors is an integer number (79321288929).

Almost surely, 2^158642577857 is an apocalyptic number.

It is an amenable number.

158642577857 is a deficient number, since it is larger than the sum of its proper divisors (1).

158642577857 is an equidigital number, since it uses as much as digits as its factorization.

158642577857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712000, while the sum is 65.

The spelling of 158642577857 in words is "one hundred fifty-eight billion, six hundred forty-two million, five hundred seventy-seven thousand, eight hundred fifty-seven".