1566255261198 has 32 divisors (see below), whose sum is σ = 3136135242240. Its totient is φ = 521481259520.

The previous prime is 1566255261143. The next prime is 1566255261209. The reversal of 1566255261198 is 8911625526651.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 22740553 + ... + 22809323.

It is an arithmetic number, because the mean of its divisors is an integer number (98004226320).

Almost surely, 2^{1566255261198} is an apocalyptic number.

1566255261198 is an abundant number, since it is smaller than the sum of its proper divisors (1569879981042).

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

1566255261198 is a wasteful number, since it uses less digits than its factorization.

1566255261198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73112.

The product of its digits is 7776000, while the sum is 57.

The spelling of 1566255261198 in words is "one trillion, five hundred sixty-six billion, two hundred fifty-five million, two hundred sixty-one thousand, one hundred ninety-eight".