6156426821 has 16 divisors (see below), whose sum is σ = 6274654848. Its totient is φ = 6039624000.

The previous prime is 6156426817. The next prime is 6156426853. The reversal of 6156426821 is 1286246516.

It is a cyclic number.

It is not a de Polignac number, because 6156426821 - 2² = 6156426817 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 (6156326821) 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, 6029291 + ... + 6030311.

It is an arithmetic number, because the mean of its divisors is an integer number (392165928).

Almost surely, 2^6156426821 is an apocalyptic number.

It is an amenable number.

6156426821 is a deficient number, since it is larger than the sum of its proper divisors (118228027).

6156426821 is a wasteful number, since it uses less digits than its factorization.

6156426821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its digits is 138240, while the sum is 41.

The square root of 6156426821 is about 78462.9009213909. The cubic root of 6156426821 is about 1832.7767793331.

The spelling of 6156426821 in words is "six billion, one hundred fifty-six million, four hundred twenty-six thousand, eight hundred twenty-one".