640260060406 has 8 divisors (see below), whose sum is σ = 960867665064. Its totient is φ = 319970838720.

The previous prime is 640260060337. The next prime is 640260060443. The reversal of 640260060406 is 604060062046.

640260060406 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.

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, 79590715 + ... + 79598758.

It is an arithmetic number, because the mean of its divisors is an integer number (120108458133).

Almost surely, 2^640260060406 is an apocalyptic number.

640260060406 is a deficient number, since it is larger than the sum of its proper divisors (320607604658).

640260060406 is a wasteful number, since it uses less digits than its factorization.

640260060406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159191486.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 640260060406 in words is "six hundred forty billion, two hundred sixty million, sixty thousand, four hundred six".