11642556164 has 6 divisors (see below), whose sum is σ = 20374473294. Its totient is φ = 5821278080.

The previous prime is 11642556161. The next prime is 11642556187. The reversal of 11642556164 is 46165524611.

It can be written as a sum of positive squares in only one way, i.e., 6076202500 + 5566353664 = 77950^2 + 74608^2 .

It is a super-2 number, since 2×11642556164² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11642556161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1455319517 + ... + 1455319524.

It is an arithmetic number, because the mean of its divisors is an integer number (3395745549).

Almost surely, 2^11642556164 is an apocalyptic number.

It is an amenable number.

11642556164 is a deficient number, since it is larger than the sum of its proper divisors (8731917130).

11642556164 is a wasteful number, since it uses less digits than its factorization.

11642556164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910639045 (or 2910639043 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The spelling of 11642556164 in words is "eleven billion, six hundred forty-two million, five hundred fifty-six thousand, one hundred sixty-four".