11537638556 has 6 divisors (see below), whose sum is σ = 20190867480. Its totient is φ = 5768819276.

The previous prime is 11537638531. The next prime is 11537638573. The reversal of 11537638556 is 65583673511.

It is a happy number.

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, 1442204816 + ... + 1442204823.

It is an arithmetic number, because the mean of its divisors is an integer number (3365144580).

Almost surely, 2^11537638556 is an apocalyptic number.

It is an amenable number.

11537638556 is a deficient number, since it is larger than the sum of its proper divisors (8653228924).

11537638556 is a wasteful number, since it uses less digits than its factorization.

11537638556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884409643 (or 2884409641 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 50.

The spelling of 11537638556 in words is "eleven billion, five hundred thirty-seven million, six hundred thirty-eight thousand, five hundred fifty-six".