12291395520 has 56 divisors (see below), whose sum is σ = 39025183824. Its totient is φ = 3277705216.

The previous prime is 12291395509. The next prime is 12291395531. The reversal of 12291395520 is 2559319221.

It is an interprime number because it is at equal distance from previous prime (12291395509) and next prime (12291395531).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6400809 + ... + 6402728.

Almost surely, 2^12291395520 is an apocalyptic number.

12291395520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12291395520 is an abundant number, since it is smaller than the sum of its proper divisors (26733788304).

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

12291395520 is a wasteful number, since it uses less digits than its factorization.

12291395520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12803557 (or 12803547 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 12291395520 in words is "twelve billion, two hundred ninety-one million, three hundred ninety-five thousand, five hundred twenty".