1839564540640 has 24 divisors (see below), whose sum is σ = 4345971227640. Its totient is φ = 735825816192.

The previous prime is 1839564540613. The next prime is 1839564540641. The reversal of 1839564540640 is 460454659381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1839564540641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5748639030 + ... + 5748639349.

It is an arithmetic number, because the mean of its divisors is an integer number (181082134485).

Almost surely, 2^{1839564540640} is an apocalyptic number.

1839564540640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1839564540640 is an abundant number, since it is smaller than the sum of its proper divisors (2506406687000).

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

1839564540640 is a wasteful number, since it uses less digits than its factorization.

1839564540640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11497278394 (or 11497278386 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 1839564540640 in words is "one trillion, eight hundred thirty-nine billion, five hundred sixty-four million, five hundred forty thousand, six hundred forty".