1564406261644 has 12 divisors (see below), whose sum is σ = 2804484396168. Its totient is φ = 763125005600.

The previous prime is 1564406261617. The next prime is 1564406261651. The reversal of 1564406261644 is 4461626044651.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4769531122 + ... + 4769531449.

It is an arithmetic number, because the mean of its divisors is an integer number (233707033014).

Almost surely, 2^{1564406261644} is an apocalyptic number.

It is an amenable number.

1564406261644 is a deficient number, since it is larger than the sum of its proper divisors (1240078134524).

1564406261644 is a wasteful number, since it uses less digits than its factorization.

1564406261644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9539062616 (or 9539062614 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 1564406261644 in words is "one trillion, five hundred sixty-four billion, four hundred six million, two hundred sixty-one thousand, six hundred forty-four".