640775507675 has 48 divisors (see below), whose sum is σ = 816059331360. Its totient is φ = 498948480000.

The previous prime is 640775507629. The next prime is 640775507741. The reversal of 640775507675 is 576705577046.

640775507675 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640775507675 - 2³⁶ = 572056030939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62200025 + ... + 62210325.

It is an arithmetic number, because the mean of its divisors is an integer number (17001236070).

Almost surely, 2^640775507675 is an apocalyptic number.

640775507675 is a deficient number, since it is larger than the sum of its proper divisors (175283823685).

640775507675 is a wasteful number, since it uses less digits than its factorization.

640775507675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10784 (or 10779 counting only the distinct ones).

The product of its (nonzero) digits is 43218000, while the sum is 59.

The spelling of 640775507675 in words is "six hundred forty billion, seven hundred seventy-five million, five hundred seven thousand, six hundred seventy-five".