156531506425 has 48 divisors (see below), whose sum is σ = 224221934592. Its totient is φ = 106180200000.

The previous prime is 156531506399. The next prime is 156531506429. The reversal of 156531506425 is 524605135651.

It is a happy number.

It is not a de Polignac number, because 156531506425 - 2⁹ = 156531505913 is a prime.

It is a super-2 number, since 2×156531506425² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156531506429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13907050 + ... + 13918300.

It is an arithmetic number, because the mean of its divisors is an integer number (4671290304).

Almost surely, 2^156531506425 is an apocalyptic number.

It is an amenable number.

156531506425 is a deficient number, since it is larger than the sum of its proper divisors (67690428167).

156531506425 is a wasteful number, since it uses less digits than its factorization.

156531506425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12118 (or 12113 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 156531506425 in words is "one hundred fifty-six billion, five hundred thirty-one million, five hundred six thousand, four hundred twenty-five".