6456421730 has 64 divisors (see below), whose sum is σ = 13470520320. Its totient is φ = 2203358400.

The previous prime is 6456421639. The next prime is 6456421759. The reversal of 6456421730 is 371246546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209195 + ... + 238065.

It is an arithmetic number, because the mean of its divisors is an integer number (210476880).

Almost surely, 2^6456421730 is an apocalyptic number.

6456421730 is an abundant number, since it is smaller than the sum of its proper divisors (7014098590).

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

6456421730 is a wasteful number, since it uses less digits than its factorization.

6456421730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29015.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 6456421730 is about 80351.8620194952. The cubic root of 6456421730 is about 1862.0755465961.

The spelling of 6456421730 in words is "six billion, four hundred fifty-six million, four hundred twenty-one thousand, seven hundred thirty".