12561057150 has 24 divisors (see below), whose sum is σ = 31151422104. Its totient is φ = 3349615200.

The previous prime is 12561057143. The next prime is 12561057193. The reversal of 12561057150 is 5175016521.

It is a happy number.

It is a super-2 number, since 2×12561057150² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41870041 + ... + 41870340.

It is an arithmetic number, because the mean of its divisors is an integer number (1297975921).

Almost surely, 2^12561057150 is an apocalyptic number.

12561057150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12561057150 is an abundant number, since it is smaller than the sum of its proper divisors (18590364954).

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

12561057150 is a wasteful number, since it uses less digits than its factorization.

12561057150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83740396 (or 83740391 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

It can be divided in two parts, 1256105 and 7150, that added together give a triangular number (1263255 = T₁₅₈₉).

The spelling of 12561057150 in words is "twelve billion, five hundred sixty-one million, fifty-seven thousand, one hundred fifty".