61541618 has 16 divisors (see below), whose sum is σ = 93697560. Its totient is φ = 30312576.

The previous prime is 61541617. The next prime is 61541621. The reversal of 61541618 is 81614516.

It can be written as a sum of positive squares in 4 ways, for example, as 58874929 + 2666689 = 7673^2 + 1633^2 .

It is not an unprimeable number, because it can be changed into a prime (61541611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42230 + ... + 43662.

Almost surely, 2^61541618 is an apocalyptic number.

61541618 is a deficient number, since it is larger than the sum of its proper divisors (32155942).

61541618 is a wasteful number, since it uses less digits than its factorization.

61541618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

The product of its digits is 5760, while the sum is 32.

The square root of 61541618 is about 7844.8465886848. The cubic root of 61541618 is about 394.8113568061.

The spelling of 61541618 in words is "sixty-one million, five hundred forty-one thousand, six hundred eighteen".