1390279866624 has 576 divisors, whose sum is σ = 4718794752000. Its totient is φ = 399837634560.

The previous prime is 1390279866601. The next prime is 1390279866667. The reversal of 1390279866624 is 4266689720931.

It is a tau number, because it is divible by the number of its divisors (576).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 130085409 + ... + 130096095.

It is an arithmetic number, because the mean of its divisors is an integer number (8192352000).

Almost surely, 2^{1390279866624} 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 1390279866624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359397376000).

1390279866624 is an abundant number, since it is smaller than the sum of its proper divisors (3328514885376).

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

1390279866624 is a wasteful number, since it uses less digits than its factorization.

1390279866624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10811 (or 10791 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 1390279866624 in words is "one trillion, three hundred ninety billion, two hundred seventy-nine million, eight hundred sixty-six thousand, six hundred twenty-four".