12988537650 has 384 divisors, whose sum is σ = 40317419520. Its totient is φ = 3048192000.

The previous prime is 12988537633. The next prime is 12988537699. The reversal of 12988537650 is 5673588921.

12988537650 is a `hidden beast` number, since 1 + 29 + 88 + 537 + 6 + 5 + 0 = 666.

It is a super-2 number, since 2×12988537650² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 102271887 + ... + 102272013.

It is an arithmetic number, because the mean of its divisors is an integer number (104993280).

Almost surely, 2^12988537650 is an apocalyptic number.

12988537650 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 12988537650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20158709760).

12988537650 is an abundant number, since it is smaller than the sum of its proper divisors (27328881870).

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

12988537650 is a wasteful number, since it uses less digits than its factorization.

12988537650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 12988537650 in words is "twelve billion, nine hundred eighty-eight million, five hundred thirty-seven thousand, six hundred fifty".