11812878964 has 6 divisors (see below), whose sum is σ = 20672538194. Its totient is φ = 5906439480.

The previous prime is 11812878943. The next prime is 11812878971. The reversal of 11812878964 is 46987821811.

It can be written as a sum of positive squares in only one way, i.e., 10504610064 + 1308268900 = 102492^2 + 36170^2 .

It is a super-2 number, since 2×11812878964² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1476609867 + ... + 1476609874.

Almost surely, 2^11812878964 is an apocalyptic number.

It is an amenable number.

11812878964 is a deficient number, since it is larger than the sum of its proper divisors (8859659230).

11812878964 is a wasteful number, since it uses less digits than its factorization.

11812878964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953219745 (or 2953219743 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 55.

The spelling of 11812878964 in words is "eleven billion, eight hundred twelve million, eight hundred seventy-eight thousand, nine hundred sixty-four".