1944117564 has 24 divisors (see below), whose sum is σ = 4559783760. Its totient is φ = 644680704.

The previous prime is 1944117551. The next prime is 1944117587. The reversal of 1944117564 is 4657114491.

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, 417399 + ... + 422030.

It is an arithmetic number, because the mean of its divisors is an integer number (189990990).

Almost surely, 2^1944117564 is an apocalyptic number.

It is an amenable number.

1944117564 is an abundant number, since it is smaller than the sum of its proper divisors (2615666196).

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

1944117564 is a wasteful number, since it uses less digits than its factorization.

1944117564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839629 (or 839627 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 1944117564 is about 44092.1485527752. The cubic root of 1944117564 is about 1248.0754520662.

The spelling of 1944117564 in words is "one billion, nine hundred forty-four million, one hundred seventeen thousand, five hundred sixty-four".