156490961 has 4 divisors (see below), whose sum is σ = 170717424. Its totient is φ = 142264500.

The previous prime is 156490949. The next prime is 156490987. The reversal of 156490961 is 169094651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 156490961 - 2¹⁰ = 156489937 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 7113215 + ... + 7113236.

It is an arithmetic number, because the mean of its divisors is an integer number (42679356).

Almost surely, 2^156490961 is an apocalyptic number.

156490961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

156490961 is a deficient number, since it is larger than the sum of its proper divisors (14226463).

156490961 is a wasteful number, since it uses less digits than its factorization.

156490961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14226462.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 156490961 is about 12509.6347268815. The cubic root of 156490961 is about 538.8854021637.

The spelling of 156490961 in words is "one hundred fifty-six million, four hundred ninety thousand, nine hundred sixty-one".