11656446646 has 16 divisors (see below), whose sum is σ = 18842899824. Its totient is φ = 5376111264.

The previous prime is 11656446563. The next prime is 11656446647. The reversal of 11656446646 is 64664465611.

It is a super-2 number, since 2×11656446646² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11656446646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656446647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119985 + ... + 194188.

It is an arithmetic number, because the mean of its divisors is an integer number (1177681239).

Almost surely, 2^11656446646 is an apocalyptic number.

11656446646 is a deficient number, since it is larger than the sum of its proper divisors (7186453178).

11656446646 is a wasteful number, since it uses less digits than its factorization.

11656446646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315615.

The product of its digits is 2488320, while the sum is 49.

The spelling of 11656446646 in words is "eleven billion, six hundred fifty-six million, four hundred forty-six thousand, six hundred forty-six".