1390956785003 has 4 divisors (see below), whose sum is σ = 1395978289920. Its totient is φ = 1385935280088.

The previous prime is 1390956784993. The next prime is 1390956785021. The reversal of 1390956785003 is 3005876590931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390956785003 - 2⁶ = 1390956784939 is a prime.

It is a super-4 number, since 4×1390956785003⁴ (a number of 50 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390956785003.

It is not an unprimeable number, because it can be changed into a prime (1390956785303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510752043 + ... + 2510752596.

It is an arithmetic number, because the mean of its divisors is an integer number (348994572480).

Almost surely, 2^{1390956785003} is an apocalyptic number.

1390956785003 is a deficient number, since it is larger than the sum of its proper divisors (5021504917).

1390956785003 is an equidigital number, since it uses as much as digits as its factorization.

1390956785003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021504916.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 1390956785003 in words is "one trillion, three hundred ninety billion, nine hundred fifty-six million, seven hundred eighty-five thousand, three".