6402621736 has 32 divisors (see below), whose sum is σ = 14526959040. Its totient is φ = 2582569728.

The previous prime is 6402621721. The next prime is 6402621737. The reversal of 6402621736 is 6371262046.

It is a junction number, because it is equal to n+sod(n) for n = 6402621695 and 6402621704.

It is not an unprimeable number, because it can be changed into a prime (6402621737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3361770 + ... + 3363673.

It is an arithmetic number, because the mean of its divisors is an integer number (453967470).

Almost surely, 2^6402621736 is an apocalyptic number.

It is an amenable number.

6402621736 is an abundant number, since it is smaller than the sum of its proper divisors (8124337304).

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

6402621736 is a wasteful number, since it uses less digits than its factorization.

6402621736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6725473 (or 6725469 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 6402621736 is about 80016.3841722431. The cubic root of 6402621736 is about 1856.8890200963.

The spelling of 6402621736 in words is "six billion, four hundred two million, six hundred twenty-one thousand, seven hundred thirty-six".