1390647135646 has 4 divisors (see below), whose sum is σ = 2085970703472. Its totient is φ = 695323567822.

The previous prime is 1390647135613. The next prime is 1390647135659. The reversal of 1390647135646 is 6465317460931.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347661783910 + ... + 347661783913.

It is an arithmetic number, because the mean of its divisors is an integer number (521492675868).

Almost surely, 2^{1390647135646} is an apocalyptic number.

1390647135646 is a deficient number, since it is larger than the sum of its proper divisors (695323567826).

1390647135646 is an equidigital number, since it uses as much as digits as its factorization.

1390647135646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695323567825.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 1390647135646 in words is "one trillion, three hundred ninety billion, six hundred forty-seven million, one hundred thirty-five thousand, six hundred forty-six".