6156321772 has 12 divisors (see below), whose sum is σ = 11241979056. Its totient is φ = 2944327760.

The previous prime is 6156321763. The next prime is 6156321779. The reversal of 6156321772 is 2771236516.

It is not an unprimeable number, because it can be changed into a prime (6156321779) 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, 33458179 + ... + 33458362.

It is an arithmetic number, because the mean of its divisors is an integer number (936831588).

Almost surely, 2^6156321772 is an apocalyptic number.

It is an amenable number.

6156321772 is a deficient number, since it is larger than the sum of its proper divisors (5085657284).

6156321772 is a wasteful number, since it uses less digits than its factorization.

6156321772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66916568 (or 66916566 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 6156321772 is about 78462.2315002575. The cubic root of 6156321772 is about 1832.7663548629.

The spelling of 6156321772 in words is "six billion, one hundred fifty-six million, three hundred twenty-one thousand, seven hundred seventy-two".