11951689400 has 48 divisors (see below), whose sum is σ = 31757349840. Its totient is φ = 4097721600.

The previous prime is 11951689327. The next prime is 11951689441. The reversal of 11951689400 is 498615911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4267061 + ... + 4269860.

It is an arithmetic number, because the mean of its divisors is an integer number (661611455).

Almost surely, 2^11951689400 is an apocalyptic number.

11951689400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11951689400 is an abundant number, since it is smaller than the sum of its proper divisors (19805660440).

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

11951689400 is a wasteful number, since it uses less digits than its factorization.

11951689400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536944 (or 8536935 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 11951689400 in words is "eleven billion, nine hundred fifty-one million, six hundred eighty-nine thousand, four hundred".