1397927963520 has 1280 divisors, whose sum is σ = 5696008750080. Its totient is φ = 323700572160.

The previous prime is 1397927963519. The next prime is 1397927963539. The reversal of 1397927963520 is 253697297931.

1397927963520 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 9 + 279 + 6 + 352 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1152454434 + ... + 1152455646.

It is an arithmetic number, because the mean of its divisors is an integer number (4450006836).

Almost surely, 2^{1397927963520} is an apocalyptic number.

1397927963520 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 1397927963520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848004375040).

1397927963520 is an abundant number, since it is smaller than the sum of its proper divisors (4298080786560).

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

1397927963520 is a wasteful number, since it uses less digits than its factorization.

1397927963520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1324 counting only the distinct ones).

The product of its (nonzero) digits is 38578680, while the sum is 63.

The spelling of 1397927963520 in words is "one trillion, three hundred ninety-seven billion, nine hundred twenty-seven million, nine hundred sixty-three thousand, five hundred twenty".