640260454413 has 8 divisors (see below), whose sum is σ = 858449772000. Its totient is φ = 424455719888.

The previous prime is 640260454397. The next prime is 640260454453. The reversal of 640260454413 is 314454062046.

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 640260454413 - 2⁴ = 640260454397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640260454453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596145138 + ... + 596146211.

It is an arithmetic number, because the mean of its divisors is an integer number (107306221500).

Almost surely, 2^640260454413 is an apocalyptic number.

It is an amenable number.

640260454413 is a deficient number, since it is larger than the sum of its proper divisors (218189317587).

640260454413 is a wasteful number, since it uses less digits than its factorization.

640260454413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192291531.

The product of its (nonzero) digits is 276480, while the sum is 39.

The spelling of 640260454413 in words is "six hundred forty billion, two hundred sixty million, four hundred fifty-four thousand, four hundred thirteen".