156646984956 has 144 divisors (see below), whose sum is σ = 464253213312. Its totient is φ = 40651094400.

The previous prime is 156646984951. The next prime is 156646984979. The reversal of 156646984956 is 659489646651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156646984951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7628455 + ... + 7648961.

It is an arithmetic number, because the mean of its divisors is an integer number (3223980648).

Almost surely, 2^156646984956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156646984956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232126606656).

156646984956 is an abundant number, since it is smaller than the sum of its proper divisors (307606228356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156646984956 is a wasteful number, since it uses less digits than its factorization.

156646984956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21720 (or 21711 counting only the distinct ones).

The product of its digits is 335923200, while the sum is 69.

The spelling of 156646984956 in words is "one hundred fifty-six billion, six hundred forty-six million, nine hundred eighty-four thousand, nine hundred fifty-six".