1390768937281 has 4 divisors (see below), whose sum is σ = 1393908370992. Its totient is φ = 1387629503572.

The previous prime is 1390768937227. The next prime is 1390768937303. The reversal of 1390768937281 is 1827398670931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1390768937281 - 2³⁷ = 1253329983809 is a prime.

It is a super-2 number, since 2×1390768937281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390768937881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1569716191 + ... + 1569717076.

It is an arithmetic number, because the mean of its divisors is an integer number (348477092748).

Almost surely, 2^{1390768937281} is an apocalyptic number.

It is an amenable number.

1390768937281 is a deficient number, since it is larger than the sum of its proper divisors (3139433711).

1390768937281 is an equidigital number, since it uses as much as digits as its factorization.

1390768937281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139433710.

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 1390768937281 in words is "one trillion, three hundred ninety billion, seven hundred sixty-eight million, nine hundred thirty-seven thousand, two hundred eighty-one".