1564140655 has 32 divisors (see below), whose sum is σ = 2358056448. Its totient is φ = 967574400.

The previous prime is 1564140649. The next prime is 1564140673. The reversal of 1564140655 is 5560414651.

It is not a de Polignac number, because 1564140655 - 2³ = 1564140647 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 34929 + ... + 65941.

It is an arithmetic number, because the mean of its divisors is an integer number (73689264).

Almost surely, 2^1564140655 is an apocalyptic number.

1564140655 is a deficient number, since it is larger than the sum of its proper divisors (793915793).

1564140655 is a wasteful number, since it uses less digits than its factorization.

1564140655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31167.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 1564140655 is about 39549.2181338645. The cubic root of 1564140655 is about 1160.8032127817.

The spelling of 1564140655 in words is "one billion, five hundred sixty-four million, one hundred forty thousand, six hundred fifty-five".