156672680761 has 9 divisors (see below), whose sum is σ = 158279641743. Its totient is φ = 155081884200.

The previous prime is 156672680719. The next prime is 156672680809. The reversal of 156672680761 is 167086276651.

The square root of 156672680761 is 395819.

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

It can be written as a sum of positive squares in only one way, i.e., 150529256361 + 6143424400 = 387981^2 + 78380^2 .

It is not a de Polignac number, because 156672680761 - 2²¹ = 156670583609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156672680161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39975760 + ... + 39979678.

Almost surely, 2^156672680761 is an apocalyptic number.

156672680761 is the 395819-th square number.

156672680761 is the 197910-th centered octagonal number.

It is an amenable number.

156672680761 is a deficient number, since it is larger than the sum of its proper divisors (1606960982).

156672680761 is an frugal number, since it uses more digits than its factorization.

156672680761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040 (or 4020 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 156672680761 in words is "one hundred fifty-six billion, six hundred seventy-two million, six hundred eighty thousand, seven hundred sixty-one".