6398726433 has 16 divisors (see below), whose sum is σ = 9309907200. Its totient is φ = 3876904080.

The previous prime is 6398726429. The next prime is 6398726449. The reversal of 6398726433 is 3346278936.

It is a happy number.

It is not a de Polignac number, because 6398726433 - 2² = 6398726429 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6398725433) 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, 97458 + ... + 149316.

It is an arithmetic number, because the mean of its divisors is an integer number (581869200).

Almost surely, 2^6398726433 is an apocalyptic number.

It is an amenable number.

6398726433 is a deficient number, since it is larger than the sum of its proper divisors (2911180767).

6398726433 is a wasteful number, since it uses less digits than its factorization.

6398726433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55612.

The product of its digits is 3919104, while the sum is 51.

The square root of 6398726433 is about 79992.0398102211. The cubic root of 6398726433 is about 1856.5123716426.

The spelling of 6398726433 in words is "six billion, three hundred ninety-eight million, seven hundred twenty-six thousand, four hundred thirty-three".