6446372156 has 24 divisors (see below), whose sum is σ = 12959556960. Its totient is φ = 2748413952.

The previous prime is 6446372131. The next prime is 6446372227. The reversal of 6446372156 is 6512736446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591041 + ... + 601848.

It is an arithmetic number, because the mean of its divisors is an integer number (539981540).

Almost surely, 2^6446372156 is an apocalyptic number.

It is an amenable number.

6446372156 is an abundant number, since it is smaller than the sum of its proper divisors (6513184804).

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

6446372156 is a wasteful number, since it uses less digits than its factorization.

6446372156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193093 (or 1193091 counting only the distinct ones).

The product of its digits is 725760, while the sum is 44.

The square root of 6446372156 is about 80289.3028740442. The cubic root of 6446372156 is about 1861.1089232715.

The spelling of 6446372156 in words is "six billion, four hundred forty-six million, three hundred seventy-two thousand, one hundred fifty-six".