12695961600 has 816 divisors, whose sum is σ = 54609421440. Its totient is φ = 2831155200.

The previous prime is 12695961599. The next prime is 12695961637. The reversal of 12695961600 is 616959621.

It is a happy number.

12695961600 is a `hidden beast` number, since 1 + 26 + 9 + 5 + 9 + 616 + 0 + 0 = 666.

It is a super-2 number, since 2×12695961600² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 309657580 + ... + 309657620.

Almost surely, 2^12695961600 is an apocalyptic number.

12695961600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12695961600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27304710720).

12695961600 is an abundant number, since it is smaller than the sum of its proper divisors (41913459840).

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

12695961600 is an frugal number, since it uses more digits than its factorization.

12695961600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 12695961600 in words is "twelve billion, six hundred ninety-five million, nine hundred sixty-one thousand, six hundred".