6405766399488 has 80 divisors (see below), whose sum is σ = 17462231113536. Its totient is φ = 2085598341120.

The previous prime is 6405766399453. The next prime is 6405766399489. The reversal of 6405766399488 is 8849936675046.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405766399489) 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, 48427218 + ... + 48559313.

Almost surely, 2^{6405766399488} is an apocalyptic number.

It is an amenable number.

6405766399488 is an abundant number, since it is smaller than the sum of its proper divisors (11056464714048).

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

6405766399488 is an equidigital number, since it uses as much as digits as its factorization.

6405766399488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96986595 (or 96986579 counting only the distinct ones).

The product of its (nonzero) digits is 1881169920, while the sum is 75.

The spelling of 6405766399488 in words is "six trillion, four hundred five billion, seven hundred sixty-six million, three hundred ninety-nine thousand, four hundred eighty-eight".