11958709864 has 32 divisors (see below), whose sum is σ = 22800493800. Its totient is φ = 5878667520.

The previous prime is 11958709853. The next prime is 11958709879. The reversal of 11958709864 is 46890785911.

11958709864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4947996964 + 7010712900 = 70342^2 + 83730^2 .

It is a super-2 number, since 2×11958709864² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11958709799 and 11958709808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1478022 + ... + 1486090.

Almost surely, 2^11958709864 is an apocalyptic number.

It is an amenable number.

11958709864 is a deficient number, since it is larger than the sum of its proper divisors (10841783936).

11958709864 is a wasteful number, since it uses less digits than its factorization.

11958709864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11173 (or 11169 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 11958709864 in words is "eleven billion, nine hundred fifty-eight million, seven hundred nine thousand, eight hundred sixty-four".