1397999812608 has 360 divisors, whose sum is σ = 4713842794752. Its totient is φ = 390916472832.

The previous prime is 1397999812589. The next prime is 1397999812609. The reversal of 1397999812608 is 8062189997931.

1397999812608 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 9 + 9 + 9 + 8 + 1 + 2 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (1397999812609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48498616 + ... + 48527432.

Almost surely, 2^{1397999812608} is an apocalyptic number.

1397999812608 is a gapful number since it is divisible by the number (18) 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 1397999812608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356921397376).

1397999812608 is an abundant number, since it is smaller than the sum of its proper divisors (3315842982144).

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

1397999812608 is an equidigital number, since it uses as much as digits as its factorization.

1397999812608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28905 (or 28876 counting only the distinct ones).

The product of its (nonzero) digits is 105815808, while the sum is 72.

The spelling of 1397999812608 in words is "one trillion, three hundred ninety-seven billion, nine hundred ninety-nine million, eight hundred twelve thousand, six hundred eight".