1390416668225 has 12 divisors (see below), whose sum is σ = 1856741028156. Its totient is φ = 1026769231680.

The previous prime is 1390416668189. The next prime is 1390416668239. The reversal of 1390416668225 is 5228666140931.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 167850812416 + 1222565855809 = 409696^2 + 1105697^2 .

It is not a de Polignac number, because 1390416668225 - 2⁶ = 1390416668161 is a prime.

It is a super-2 number, since 2×1390416668225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2139102242 + ... + 2139102891.

It is an arithmetic number, because the mean of its divisors is an integer number (154728419013).

Almost surely, 2^{1390416668225} is an apocalyptic number.

It is an amenable number.

1390416668225 is a deficient number, since it is larger than the sum of its proper divisors (466324359931).

1390416668225 is a wasteful number, since it uses less digits than its factorization.

1390416668225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278205156 (or 4278205151 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 1390416668225 in words is "one trillion, three hundred ninety billion, four hundred sixteen million, six hundred sixty-eight thousand, two hundred twenty-five".