156490491 has 16 divisors (see below), whose sum is σ = 221387904. Its totient is φ = 97985664.

The previous prime is 156490483. The next prime is 156490513. The reversal of 156490491 is 194094651.

It is not a de Polignac number, because 156490491 - 2³ = 156490483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156490991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23740 + ... + 29606.

It is an arithmetic number, because the mean of its divisors is an integer number (13836744).

Almost surely, 2^156490491 is an apocalyptic number.

156490491 is a deficient number, since it is larger than the sum of its proper divisors (64897413).

156490491 is a wasteful number, since it uses less digits than its factorization.

156490491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 156490491 is about 12509.6159413469. The cubic root of 156490491 is about 538.8848626727.

The spelling of 156490491 in words is "one hundred fifty-six million, four hundred ninety thousand, four hundred ninety-one".