6402905977 has 8 divisors (see below), whose sum is σ = 6915903176. Its totient is φ = 5892832512.

The previous prime is 6402905921. The next prime is 6402905983. The reversal of 6402905977 is 7795092046.

It can be written as a sum of positive squares in 4 ways, for example, as 86471401 + 6316434576 = 9299^2 + 79476^2 .

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 6402905977 - 2¹¹ = 6402903929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6402905977.

It is not an unprimeable number, because it can be changed into a prime (6402905477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726378 + ... + 735139.

It is an arithmetic number, because the mean of its divisors is an integer number (864487897).

Almost surely, 2^6402905977 is an apocalyptic number.

It is an amenable number.

6402905977 is a deficient number, since it is larger than the sum of its proper divisors (512997199).

6402905977 is a wasteful number, since it uses less digits than its factorization.

6402905977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461867.

The product of its (nonzero) digits is 952560, while the sum is 49.

The square root of 6402905977 is about 80018.1602950230. The cubic root of 6402905977 is about 1856.9164982244.

The spelling of 6402905977 in words is "six billion, four hundred two million, nine hundred five thousand, nine hundred seventy-seven".