1391003172864 has 368 divisors, whose sum is σ = 4203698739840. Its totient is φ = 454494781440.

The previous prime is 1391003172857. The next prime is 1391003172877. The reversal of 1391003172864 is 4682713001931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8040480682 + ... + 8040480854.

Almost surely, 2^{1391003172864} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391003172864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2101849369920).

1391003172864 is an abundant number, since it is smaller than the sum of its proper divisors (2812695566976).

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

1391003172864 is an frugal number, since it uses more digits than its factorization.

1391003172864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 1391003172864 in words is "one trillion, three hundred ninety-one billion, three million, one hundred seventy-two thousand, eight hundred sixty-four".