61115618 has 16 divisors (see below), whose sum is σ = 92954304. Its totient is φ = 30133680.

The previous prime is 61115617. The next prime is 61115627. The reversal of 61115618 is 81651116.

It is not an unprimeable number, because it can be changed into a prime (61115611) 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, 58763 + ... + 59793.

It is an arithmetic number, because the mean of its divisors is an integer number (5809644).

Almost surely, 2^61115618 is an apocalyptic number.

61115618 is a deficient number, since it is larger than the sum of its proper divisors (31838686).

61115618 is a wasteful number, since it uses less digits than its factorization.

61115618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417.

The product of its digits is 1440, while the sum is 29.

The square root of 61115618 is about 7817.6478559730. The cubic root of 61115618 is about 393.8982662261.

The spelling of 61115618 in words is "sixty-one million, one hundred fifteen thousand, six hundred eighteen".