2640257057784 has 16 divisors (see below), whose sum is σ = 6600642644520. Its totient is φ = 880085685920.

The previous prime is 2640257057741. The next prime is 2640257057803. The reversal of 2640257057784 is 4877507520462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55005355347 + ... + 55005355394.

Almost surely, 2^{2640257057784} is an apocalyptic number.

2640257057784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2640257057784 is an abundant number, since it is smaller than the sum of its proper divisors (3960385586736).

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

2640257057784 is a wasteful number, since it uses less digits than its factorization.

2640257057784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110010710750 (or 110010710746 counting only the distinct ones).

The product of its (nonzero) digits is 26342400, while the sum is 57.

The spelling of 2640257057784 in words is "two trillion, six hundred forty billion, two hundred fifty-seven million, fifty-seven thousand, seven hundred eighty-four".