6402646090 has 8 divisors (see below), whose sum is σ = 11524762980. Its totient is φ = 2561058432.

The previous prime is 6402646069. The next prime is 6402646109. The reversal of 6402646090 is 906462046.

It can be written as a sum of positive squares in 2 ways, for example, as 5745185209 + 657460881 = 75797^2 + 25641^2 .

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

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, 320132295 + ... + 320132314.

Almost surely, 2^6402646090 is an apocalyptic number.

6402646090 is a deficient number, since it is larger than the sum of its proper divisors (5122116890).

6402646090 is a wasteful number, since it uses less digits than its factorization.

6402646090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640264616.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 6402646090 is about 80016.5363534313. The cubic root of 6402646090 is about 1856.8913744765.

The spelling of 6402646090 in words is "six billion, four hundred two million, six hundred forty-six thousand, ninety".