6156779994 has 24 divisors (see below), whose sum is σ = 13341257280. Its totient is φ = 2052018888.

The previous prime is 6156779933. The next prime is 6156779999. The reversal of 6156779994 is 4999776516.

6156779994 is a `hidden beast` number, since 61 + 567 + 7 + 9 + 9 + 9 + 4 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6156779999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206329 + ... + 234275.

It is an arithmetic number, because the mean of its divisors is an integer number (555885720).

Almost surely, 2^6156779994 is an apocalyptic number.

6156779994 is an abundant number, since it is smaller than the sum of its proper divisors (7184477286).

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

6156779994 is a wasteful number, since it uses less digits than its factorization.

6156779994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40194 (or 40191 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The square root of 6156779994 is about 78465.1514622893. The cubic root of 6156779994 is about 1832.8118253598.

The spelling of 6156779994 in words is "six billion, one hundred fifty-six million, seven hundred seventy-nine thousand, nine hundred ninety-four".