1231253913600 has 1800 divisors, whose sum is σ = 5044186057680. Its totient is φ = 295572602880.

The previous prime is 1231253913581. The next prime is 1231253913653. The reversal of 1231253913600 is 63193521321.

1231253913600 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 2 + 5 + 39 + 13 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (1800).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 20868710371 + ... + 20868710429.

Almost surely, 2^{1231253913600} is an apocalyptic number.

1231253913600 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 1231253913600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2522093028840).

1231253913600 is an abundant number, since it is smaller than the sum of its proper divisors (3812932144080).

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

1231253913600 is an equidigital number, since it uses as much as digits as its factorization.

1231253913600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The spelling of 1231253913600 in words is "one trillion, two hundred thirty-one billion, two hundred fifty-three million, nine hundred thirteen thousand, six hundred".