12571123950 has 216 divisors, whose sum is σ = 42861129480. Its totient is φ = 2612131200.

The previous prime is 12571123933. The next prime is 12571123979. The reversal of 12571123950 is 5932117521.

12571123950 is a `hidden beast` number, since 1 + 2 + 571 + 1 + 2 + 39 + 50 = 666.

12571123950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 216636 + ... + 268464.

It is an arithmetic number, because the mean of its divisors is an integer number (198431155).

Almost surely, 2^12571123950 is an apocalyptic number.

12571123950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12571123950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21430564740).

12571123950 is an abundant number, since it is smaller than the sum of its proper divisors (30290005530).

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

12571123950 is a wasteful number, since it uses less digits than its factorization.

12571123950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51872 (or 51857 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The spelling of 12571123950 in words is "twelve billion, five hundred seventy-one million, one hundred twenty-three thousand, nine hundred fifty".