12571095550 has 24 divisors (see below), whose sum is σ = 25180872696. Its totient is φ = 4641635040.

The previous prime is 12571095547. The next prime is 12571095569. The reversal of 12571095550 is 5559017521.

It is a happy number.

It is a hoax number, since the sum of its digits (40) 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 11 ways as a sum of consecutive naturals, for example, 9669424 + ... + 9670723.

It is an arithmetic number, because the mean of its divisors is an integer number (1049203029).

Almost surely, 2^12571095550 is an apocalyptic number.

12571095550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12571095550 is an abundant number, since it is smaller than the sum of its proper divisors (12609777146).

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

12571095550 is a wasteful number, since it uses less digits than its factorization.

12571095550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19340172 (or 19340167 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 40.

The spelling of 12571095550 in words is "twelve billion, five hundred seventy-one million, ninety-five thousand, five hundred fifty".