6156651561 has 16 divisors (see below), whose sum is σ = 8366595840. Its totient is φ = 4025623680.

The previous prime is 6156651547. The next prime is 6156651563. The reversal of 6156651561 is 1651566516.

It is not a de Polignac number, because 6156651561 - 2⁹ = 6156651049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6156651563) 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, 701760 + ... + 710478.

It is an arithmetic number, because the mean of its divisors is an integer number (522912240).

Almost surely, 2^6156651561 is an apocalyptic number.

It is an amenable number.

6156651561 is a deficient number, since it is larger than the sum of its proper divisors (2209944279).

6156651561 is a wasteful number, since it uses less digits than its factorization.

6156651561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13216.

The product of its digits is 162000, while the sum is 42.

The square root of 6156651561 is about 78464.3330501190. Note that the first 3 decimals coincide. The cubic root of 6156651561 is about 1832.7990808646.

The spelling of 6156651561 in words is "six billion, one hundred fifty-six million, six hundred fifty-one thousand, five hundred sixty-one".