1390253205966 has 16 divisors (see below), whose sum is σ = 2809171427664. Its totient is φ = 458640232704.

The previous prime is 1390253205919. The next prime is 1390253205977. The reversal of 1390253205966 is 6695023520931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194375025 + ... + 1194376188.

It is an arithmetic number, because the mean of its divisors is an integer number (175573214229).

Almost surely, 2^{1390253205966} is an apocalyptic number.

1390253205966 is an abundant number, since it is smaller than the sum of its proper divisors (1418918221698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390253205966 is a wasteful number, since it uses less digits than its factorization.

1390253205966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388751315.

The product of its (nonzero) digits is 2624400, while the sum is 51.

It can be divided in two parts, 139025 and 3205966, that added together give a triangular number (3344991 = T₂₅₈₆).

The spelling of 1390253205966 in words is "one trillion, three hundred ninety billion, two hundred fifty-three million, two hundred five thousand, nine hundred sixty-six".