5640554861520 has 80 divisors (see below), whose sum is σ = 17486100079872. Its totient is φ = 1504115274240.

The previous prime is 5640554861471. The next prime is 5640554861521. The reversal of 5640554861520 is 251684550465.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640554861521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12042105 + ... + 12501735.

Almost surely, 2^{5640554861520} is an apocalyptic number.

It is an amenable number.

5640554861520 is an abundant number, since it is smaller than the sum of its proper divisors (11845545218352).

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

5640554861520 is a wasteful number, since it uses less digits than its factorization.

5640554861520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510780 (or 510774 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 51.

The spelling of 5640554861520 in words is "five trillion, six hundred forty billion, five hundred fifty-four million, eight hundred sixty-one thousand, five hundred twenty".