11664156534 has 32 divisors (see below), whose sum is σ = 24128907264. Its totient is φ = 3755120640.

The previous prime is 11664156473. The next prime is 11664156557. The reversal of 11664156534 is 43565146611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31222 + ... + 155894.

It is an arithmetic number, because the mean of its divisors is an integer number (754028352).

Almost surely, 2^11664156534 is an apocalyptic number.

11664156534 is an abundant number, since it is smaller than the sum of its proper divisors (12464750730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11664156534 is a wasteful number, since it uses less digits than its factorization.

11664156534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125212.

The product of its digits is 259200, while the sum is 42.

The spelling of 11664156534 in words is "eleven billion, six hundred sixty-four million, one hundred fifty-six thousand, five hundred thirty-four".