6161557156 has 12 divisors (see below), whose sum is σ = 10786002892. Its totient is φ = 3079842048.

The previous prime is 6161557151. The next prime is 6161557187. The reversal of 6161557156 is 6517551616.

It can be written as a sum of positive squares in 2 ways, for example, as 4514496100 + 1647061056 = 67190^2 + 40584^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6161557151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219225 + ... + 245728.

Almost surely, 2^6161557156 is an apocalyptic number.

It is an amenable number.

6161557156 is a deficient number, since it is larger than the sum of its proper divisors (4624445736).

6161557156 is a wasteful number, since it uses less digits than its factorization.

6161557156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468270 (or 468268 counting only the distinct ones).

The product of its digits is 189000, while the sum is 43.

The square root of 6161557156 is about 78495.5868568418. The cubic root of 6161557156 is about 1833.2857405900.

The spelling of 6161557156 in words is "six billion, one hundred sixty-one million, five hundred fifty-seven thousand, one hundred fifty-six".