640151020754 has 24 divisors (see below), whose sum is σ = 1118375658288. Its totient is φ = 274012116840.

The previous prime is 640151020739. The next prime is 640151020787. The reversal of 640151020754 is 457020151046.

640151020754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3947744 + ... + 4106699.

It is an arithmetic number, because the mean of its divisors is an integer number (46598985762).

Almost surely, 2^640151020754 is an apocalyptic number.

640151020754 is a deficient number, since it is larger than the sum of its proper divisors (478224637534).

640151020754 is a wasteful number, since it uses less digits than its factorization.

640151020754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8055270 (or 8055263 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 640151020754 in words is "six hundred forty billion, one hundred fifty-one million, twenty thousand, seven hundred fifty-four".