11572217461 has 32 divisors (see below), whose sum is σ = 13602816000. Its totient is φ = 9640518720.

The previous prime is 11572217431. The next prime is 11572217473. The reversal of 11572217461 is 16471227511.

It is not a de Polignac number, because 11572217461 - 2⁵ = 11572217429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11572217461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11572217411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23568426 + ... + 23568916.

It is an arithmetic number, because the mean of its divisors is an integer number (425088000).

Almost surely, 2^11572217461 is an apocalyptic number.

It is an amenable number.

11572217461 is a deficient number, since it is larger than the sum of its proper divisors (2030598539).

11572217461 is a wasteful number, since it uses less digits than its factorization.

11572217461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its digits is 23520, while the sum is 37.

The spelling of 11572217461 in words is "eleven billion, five hundred seventy-two million, two hundred seventeen thousand, four hundred sixty-one".