6404779746 has 24 divisors (see below), whose sum is σ = 14355541980. Its totient is φ = 2061308256.

The previous prime is 6404779741. The next prime is 6404779747. The reversal of 6404779746 is 6479774046.

6404779746 is a `hidden beast` number, since 6 + 40 + 477 + 97 + 46 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5732155521 + 672624225 = 75711^2 + 25935^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6404779692 and 6404779701.

It is not an unprimeable number, because it can be changed into a prime (6404779741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6134325 + ... + 6135368.

Almost surely, 2^6404779746 is an apocalyptic number.

6404779746 is an abundant number, since it is smaller than the sum of its proper divisors (7950762234).

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

6404779746 is a wasteful number, since it uses less digits than its factorization.

6404779746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12269730 (or 12269727 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The square root of 6404779746 is about 80029.8678369520. The cubic root of 6404779746 is about 1857.0976187566.

The spelling of 6404779746 in words is "six billion, four hundred four million, seven hundred seventy-nine thousand, seven hundred forty-six".