12191951610 has 48 divisors (see below), whose sum is σ = 31720572000. Its totient is φ = 3248982240.

The previous prime is 12191951581. The next prime is 12191951627. The reversal of 12191951610 is 1615919121.

12191951610 is a `hidden beast` number, since 1 + 21 + 9 + 19 + 5 + 1 + 610 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89725 + ... + 180095.

It is an arithmetic number, because the mean of its divisors is an integer number (660845250).

Almost surely, 2^12191951610 is an apocalyptic number.

12191951610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12191951610 is an abundant number, since it is smaller than the sum of its proper divisors (19528620390).

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

12191951610 is a wasteful number, since it uses less digits than its factorization.

12191951610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91883 (or 91880 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 36.

The spelling of 12191951610 in words is "twelve billion, one hundred ninety-one million, nine hundred fifty-one thousand, six hundred ten".