640400006094 has 8 divisors (see below), whose sum is σ = 1280800012200. Its totient is φ = 213466668696.

The previous prime is 640400006087. The next prime is 640400006119. The reversal of 640400006094 is 490600004046.

640400006094 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

640400006094 is an admirable number.

It is a super-2 number, since 2×640400006094² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53366667169 + ... + 53366667180.

It is an arithmetic number, because the mean of its divisors is an integer number (160100001525).

Almost surely, 2^640400006094 is an apocalyptic number.

640400006094 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

640400006094 is a wasteful number, since it uses less digits than its factorization.

640400006094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106733334354.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 640400006094 in words is "six hundred forty billion, four hundred million, six thousand, ninety-four".