6455721029 has 16 divisors (see below), whose sum is σ = 7101751680. Its totient is φ = 5841126720.

The previous prime is 6455721017. The next prime is 6455721043. The reversal of 6455721029 is 9201275546.

It is a cyclic number.

It is not a de Polignac number, because 6455721029 - 2¹² = 6455716933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6455721089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284939 + ... + 306759.

It is an arithmetic number, because the mean of its divisors is an integer number (443859480).

Almost surely, 2^6455721029 is an apocalyptic number.

It is an amenable number.

6455721029 is a deficient number, since it is larger than the sum of its proper divisors (646030651).

6455721029 is a wasteful number, since it uses less digits than its factorization.

6455721029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22540.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 6455721029 is about 80347.5016973148. The cubic root of 6455721029 is about 1862.0081818619.

The spelling of 6455721029 in words is "six billion, four hundred fifty-five million, seven hundred twenty-one thousand, twenty-nine".