156346981 has 16 divisors (see below), whose sum is σ = 188955648. Its totient is φ = 126518400.

The previous prime is 156346973. The next prime is 156346997. The reversal of 156346981 is 189643651.

It is a cyclic number.

It is not a de Polignac number, because 156346981 - 2³ = 156346973 is a prime.

It is a super-2 number, since 2×156346981² = 48888756935628722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156346381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111 + ... + 17683.

It is an arithmetic number, because the mean of its divisors is an integer number (11809728).

Almost surely, 2^156346981 is an apocalyptic number.

It is an amenable number.

156346981 is a deficient number, since it is larger than the sum of its proper divisors (32608667).

156346981 is a wasteful number, since it uses less digits than its factorization.

156346981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652.

The product of its digits is 155520, while the sum is 43.

The square root of 156346981 is about 12503.8786382466. The cubic root of 156346981 is about 538.7200837173.

The spelling of 156346981 in words is "one hundred fifty-six million, three hundred forty-six thousand, nine hundred eighty-one".