1390856479489 has 4 divisors (see below), whose sum is σ = 1423201979056. Its totient is φ = 1358510979924.

The previous prime is 1390856479487. The next prime is 1390856479499. The reversal of 1390856479489 is 9849746580931.

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 1390856479489 - 2¹ = 1390856479487 is a prime.

It is a super-2 number, since 2×1390856479489² (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 (1390856479487) 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, 16172749719 + ... + 16172749804.

It is an arithmetic number, because the mean of its divisors is an integer number (355800494764).

Almost surely, 2^{1390856479489} is an apocalyptic number.

It is an amenable number.

1390856479489 is a deficient number, since it is larger than the sum of its proper divisors (32345499567).

1390856479489 is an equidigital number, since it uses as much as digits as its factorization.

1390856479489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32345499566.

The product of its (nonzero) digits is 470292480, while the sum is 73.

The spelling of 1390856479489 in words is "one trillion, three hundred ninety billion, eight hundred fifty-six million, four hundred seventy-nine thousand, four hundred eighty-nine".