156464491 has 2 divisors, whose sum is σ = 156464492. Its totient is φ = 156464490.

The previous prime is 156464467. The next prime is 156464501. The reversal of 156464491 is 194464651.

It is a strong prime.

It is an emirp because it is prime and its reverse (194464651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156464491 - 2⁵ = 156464459 is a prime.

It is a super-2 number, since 2×156464491² = 48962273887778162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156464431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78232245 + 78232246.

It is an arithmetic number, because the mean of its divisors is an integer number (78232246).

Almost surely, 2^156464491 is an apocalyptic number.

156464491 is a deficient number, since it is larger than the sum of its proper divisors (1).

156464491 is an equidigital number, since it uses as much as digits as its factorization.

156464491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 156464491 is about 12508.5766976103. The cubic root of 156464491 is about 538.8550168072.

The spelling of 156464491 in words is "one hundred fifty-six million, four hundred sixty-four thousand, four hundred ninety-one".