1399533734400 has 720 divisors, whose sum is σ = 4911236535744. Its totient is φ = 350658232320.

The previous prime is 1399533734399. The next prime is 1399533734411. The reversal of 1399533734400 is 44373359931.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3964684624 + ... + 3964684976.

Almost surely, 2^{1399533734400} is an apocalyptic number.

1399533734400 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 1399533734400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2455618267872).

1399533734400 is an abundant number, since it is smaller than the sum of its proper divisors (3511702801344).

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

1399533734400 is an equidigital number, since it uses as much as digits as its factorization.

1399533734400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 51.

The spelling of 1399533734400 in words is "one trillion, three hundred ninety-nine billion, five hundred thirty-three million, seven hundred thirty-four thousand, four hundred".