6156551566 has 16 divisors (see below), whose sum is σ = 10088961408. Its totient is φ = 2794375800.

The previous prime is 6156551521. The next prime is 6156551567. The reversal of 6156551566 is 6651556516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6156551567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187290 + ... + 217693.

It is an arithmetic number, because the mean of its divisors is an integer number (630560088).

Almost surely, 2^6156551566 is an apocalyptic number.

6156551566 is a deficient number, since it is larger than the sum of its proper divisors (3932409842).

6156551566 is a wasteful number, since it uses less digits than its factorization.

6156551566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405687.

The product of its digits is 810000, while the sum is 46.

The square root of 6156551566 is about 78463.6958471878. The cubic root of 6156551566 is about 1832.7891581691.

The spelling of 6156551566 in words is "six billion, one hundred fifty-six million, five hundred fifty-one thousand, five hundred sixty-six".