11672425521 has 9 divisors (see below), whose sum is σ = 16860638379. Its totient is φ = 7781400936.

The previous prime is 11672425519. The next prime is 11672425529. The reversal of 11672425521 is 12552427611.

The square root of 11672425521 is 108039.

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

11672425521 is a `hidden beast` number, since 1 + 1 + 67 + 2 + 42 + 552 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5117256225 + 6555169296 = 71535^2 + 80964^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 11672425521 - 2¹ = 11672425519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11672425529) 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, 306111 + ... + 342123.

Almost surely, 2^11672425521 is an apocalyptic number.

11672425521 is the 108039-th square number.

11672425521 is the 54020-th centered octagonal number.

It is an amenable number.

11672425521 is a deficient number, since it is larger than the sum of its proper divisors (5188212858).

11672425521 is an frugal number, since it uses more digits than its factorization.

11672425521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72032 (or 36016 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

Multiplying 11672425521 by its sum of digits (36), we get a square (420207318756 = 648234²).

The spelling of 11672425521 in words is "eleven billion, six hundred seventy-two million, four hundred twenty-five thousand, five hundred twenty-one".