12537116550 has 192 divisors, whose sum is σ = 40401461760. Its totient is φ = 2798893440.

The previous prime is 12537116479. The next prime is 12537116563. The reversal of 12537116550 is 5561173521.

It is a happy number.

12537116550 is a `hidden beast` number, since 1 + 2 + 537 + 11 + 65 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 390924 + ... + 421776.

It is an arithmetic number, because the mean of its divisors is an integer number (210424280).

Almost surely, 2^12537116550 is an apocalyptic number.

12537116550 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 12537116550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20200730880).

12537116550 is an abundant number, since it is smaller than the sum of its proper divisors (27864345210).

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

12537116550 is a wasteful number, since it uses less digits than its factorization.

12537116550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30924 (or 30913 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The spelling of 12537116550 in words is "twelve billion, five hundred thirty-seven million, one hundred sixteen thousand, five hundred fifty".