156491371852 has 6 divisors (see below), whose sum is σ = 273859900748. Its totient is φ = 78245685924.

The previous prime is 156491371783. The next prime is 156491371891. The reversal of 156491371852 is 258173194651.

It is a self number, because there is not a number n which added to its sum of digits gives 156491371852.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19561421478 + ... + 19561421485.

Almost surely, 2^156491371852 is an apocalyptic number.

It is an amenable number.

156491371852 is a deficient number, since it is larger than the sum of its proper divisors (117368528896).

156491371852 is a wasteful number, since it uses less digits than its factorization.

156491371852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39122842967 (or 39122842965 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The spelling of 156491371852 in words is "one hundred fifty-six billion, four hundred ninety-one million, three hundred seventy-one thousand, eight hundred fifty-two".