640377255027 has 8 divisors (see below), whose sum is σ = 890959659264. Its totient is φ = 408356510408.

The previous prime is 640377254989. The next prime is 640377255031. The reversal of 640377255027 is 720552773046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640377255027 - 2⁶ = 640377254963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640377250027) 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, 4640414823 + ... + 4640414960.

It is an arithmetic number, because the mean of its divisors is an integer number (111369957408).

Almost surely, 2^640377255027 is an apocalyptic number.

640377255027 is a deficient number, since it is larger than the sum of its proper divisors (250582404237).

640377255027 is a wasteful number, since it uses less digits than its factorization.

640377255027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280829809.

The product of its (nonzero) digits is 2469600, while the sum is 48.

The spelling of 640377255027 in words is "six hundred forty billion, three hundred seventy-seven million, two hundred fifty-five thousand, twenty-seven".