6156647901 has 6 divisors (see below), whose sum is σ = 8892935870. Its totient is φ = 4104431928.

The previous prime is 6156647897. The next prime is 6156647911. The reversal of 6156647901 is 1097466516.

It can be written as a sum of positive squares in only one way, i.e., 6006095001 + 150552900 = 77499^2 + 12270^2 .

It is not a de Polignac number, because 6156647901 - 2² = 6156647897 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 (6156647911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342035986 + ... + 342036003.

Almost surely, 2^6156647901 is an apocalyptic number.

It is an amenable number.

6156647901 is a deficient number, since it is larger than the sum of its proper divisors (2736287969).

6156647901 is a wasteful number, since it uses less digits than its factorization.

6156647901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684071995 (or 684071992 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 6156647901 is about 78464.3097274168. The cubic root of 6156647901 is about 1832.7987176777.

The spelling of 6156647901 in words is "six billion, one hundred fifty-six million, six hundred forty-seven thousand, nine hundred one".