11961211464 has 32 divisors (see below), whose sum is σ = 33225588000. Its totient is φ = 3987070416.

The previous prime is 11961211447. The next prime is 11961211469. The reversal of 11961211464 is 46411216911.

11961211464 is a `hidden beast` number, since 1 + 196 + 1 + 2 + 1 + 1 + 464 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11961211469) 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, 27687774 + ... + 27688205.

It is an arithmetic number, because the mean of its divisors is an integer number (1038299625).

Almost surely, 2^11961211464 is an apocalyptic number.

It is an amenable number.

11961211464 is an abundant number, since it is smaller than the sum of its proper divisors (21264376536).

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

11961211464 is a wasteful number, since it uses less digits than its factorization.

11961211464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55375994 (or 55375984 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The spelling of 11961211464 in words is "eleven billion, nine hundred sixty-one million, two hundred eleven thousand, four hundred sixty-four".