2640421545612 has 24 divisors (see below), whose sum is σ = 6327496677936. Its totient is φ = 856352933568.

The previous prime is 2640421545547. The next prime is 2640421545613. The reversal of 2640421545612 is 2165451240462.

It is not an unprimeable number, because it can be changed into a prime (2640421545613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2973447243 + ... + 2973448130.

It is an arithmetic number, because the mean of its divisors is an integer number (263645694914).

Almost surely, 2^{2640421545612} is an apocalyptic number.

It is an amenable number.

2640421545612 is an abundant number, since it is smaller than the sum of its proper divisors (3687075132324).

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

2640421545612 is a wasteful number, since it uses less digits than its factorization.

2640421545612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5946895417 (or 5946895415 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 2640421545612 in words is "two trillion, six hundred forty billion, four hundred twenty-one million, five hundred forty-five thousand, six hundred twelve".