6161557 has 4 divisors (see below), whose sum is σ = 6167340. Its totient is φ = 6155776.

The previous prime is 6161527. The next prime is 6161579. The reversal of 6161557 is 7551616.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1347921 + 4813636 = 1161^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 6161557 - 2¹¹ = 6159509 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778 + ... + 3595.

It is an arithmetic number, because the mean of its divisors is an integer number (1541835).

Almost surely, 2^6161557 is an apocalyptic number.

It is an amenable number.

6161557 is a deficient number, since it is larger than the sum of its proper divisors (5783).

6161557 is a wasteful number, since it uses less digits than its factorization.

6161557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782.

The product of its digits is 6300, while the sum is 31.

The square root of 6161557 is about 2482.2483759689. The cubic root of 6161557 is about 183.3285725118.

The spelling of 6161557 in words is "six million, one hundred sixty-one thousand, five hundred fifty-seven".