12146651550 has 432 divisors, whose sum is σ = 38591280000. Its totient is φ = 2728598400.

The previous prime is 12146651527. The next prime is 12146651563. The reversal of 12146651550 is 5515664121.

12146651550 is a `hidden beast` number, since 1 + 2 + 1 + 46 + 65 + 1 + 550 = 666.

It is a super-2 number, since 2×12146651550² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 61038351 + ... + 61038549.

Almost surely, 2^12146651550 is an apocalyptic number.

12146651550 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 12146651550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19295640000).

12146651550 is an abundant number, since it is smaller than the sum of its proper divisors (26444628450).

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

12146651550 is a wasteful number, since it uses less digits than its factorization.

12146651550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 12146651550 in words is "twelve billion, one hundred forty-six million, six hundred fifty-one thousand, five hundred fifty".