156491413 has 8 divisors (see below), whose sum is σ = 171292856. Its totient is φ = 142084800.

The previous prime is 156491407. The next prime is 156491473. The reversal of 156491413 is 314194651.

It can be written as a sum of positive squares in 4 ways, for example, as 1787569 + 154703844 = 1337^2 + 12438^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-156491413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156491473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97878 + ... + 99463.

It is an arithmetic number, because the mean of its divisors is an integer number (21411607).

Almost surely, 2^156491413 is an apocalyptic number.

156491413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

156491413 is a deficient number, since it is larger than the sum of its proper divisors (14801443).

156491413 is a wasteful number, since it uses less digits than its factorization.

156491413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197415.

The product of its digits is 12960, while the sum is 34.

The square root of 156491413 is about 12509.6527929435. The cubic root of 156491413 is about 538.8859209923.

The spelling of 156491413 in words is "one hundred fifty-six million, four hundred ninety-one thousand, four hundred thirteen".