11951957910 has 64 divisors (see below), whose sum is σ = 29094912000. Its totient is φ = 3141908352.

The previous prime is 11951957909. The next prime is 11951957921. The reversal of 11951957910 is 1975915911.

11951957910 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11951957910.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641547 + ... + 659913.

It is an arithmetic number, because the mean of its divisors is an integer number (454608000).

Almost surely, 2^11951957910 is an apocalyptic number.

11951957910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11951957910 is an abundant number, since it is smaller than the sum of its proper divisors (17142954090).

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

11951957910 is a wasteful number, since it uses less digits than its factorization.

11951957910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18685.

The product of its (nonzero) digits is 127575, while the sum is 48.

The spelling of 11951957910 in words is "eleven billion, nine hundred fifty-one million, nine hundred fifty-seven thousand, nine hundred ten".