2640531442368 has 56 divisors (see below), whose sum is σ = 7354111702720. Its totient is φ = 833852033280.

The previous prime is 2640531442361. The next prime is 2640531442399. The reversal of 2640531442368 is 8632441350462.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (2640531442361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 361911298 + ... + 361918593.

Almost surely, 2^{2640531442368} is an apocalyptic number.

It is an amenable number.

2640531442368 is an abundant number, since it is smaller than the sum of its proper divisors (4713580260352).

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

2640531442368 is a wasteful number, since it uses less digits than its factorization.

2640531442368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723829925 (or 723829915 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 2640531442368 in words is "two trillion, six hundred forty billion, five hundred thirty-one million, four hundred forty-two thousand, three hundred sixty-eight".