6455430521 has 4 divisors (see below), whose sum is σ = 6456811344. Its totient is φ = 6454049700.

The previous prime is 6455430511. The next prime is 6455430529. The reversal of 6455430521 is 1250345546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6455430521 is a prime.

It is a super-2 number, since 2×6455430521² = 83345166422916662882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6455430529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683375 + ... + 692756.

It is an arithmetic number, because the mean of its divisors is an integer number (1614202836).

Almost surely, 2^6455430521 is an apocalyptic number.

It is an amenable number.

6455430521 is a deficient number, since it is larger than the sum of its proper divisors (1380823).

6455430521 is a wasteful number, since it uses less digits than its factorization.

6455430521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380822.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 6455430521 is about 80345.6938547425. The cubic root of 6455430521 is about 1861.9802512670.

The spelling of 6455430521 in words is "six billion, four hundred fifty-five million, four hundred thirty thousand, five hundred twenty-one".