156918162783204 has 81 divisors (see below), whose sum is σ = 398352925630569. Its totient is φ = 52083003876480.

The previous prime is 156918162783133. The next prime is 156918162783211. The reversal of 156918162783204 is 402387261819651.

It is a happy number.

The square root of 156918162783204 is 12526698.

It is a perfect power (a square), and thus also a powerful number.

156918162783204 is a `hidden beast` number, since 1 + 5 + 6 + 9 + 181 + 62 + 78 + 320 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118013503013604 + 38904659769600 = 10863402^2 + 6237360^2 .

It is a super-2 number, since 2×156918162783204² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18113600977 + ... + 18113609639.

It is a 1-persistent number, because it is pandigital, but 2⋅156918162783204 = 313836325566408 is not.

Almost surely, 2^{156918162783204} is an apocalyptic number.

156918162783204 is the 12526698-th square number.

It is an amenable number.

156918162783204 is an abundant number, since it is smaller than the sum of its proper divisors (241434762847365).

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

156918162783204 is an frugal number, since it uses more digits than its factorization.

156918162783204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17818 (or 8909 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 156918162783204 in words is "one hundred fifty-six trillion, nine hundred eighteen billion, one hundred sixty-two million, seven hundred eighty-three thousand, two hundred four".