61368618 has 16 divisors (see below), whose sum is σ = 124419456. Its totient is φ = 20175840.

The previous prime is 61368569. The next prime is 61368661. The reversal of 61368618 is 81686316.

It is a super-2 number, since 2×61368618² = 7532214550459848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69618 + ... + 70493.

It is an arithmetic number, because the mean of its divisors is an integer number (7776216).

Almost surely, 2^61368618 is an apocalyptic number.

61368618 is an abundant number, since it is smaller than the sum of its proper divisors (63050838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61368618 is a wasteful number, since it uses less digits than its factorization.

61368618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140189.

The product of its digits is 41472, while the sum is 39.

The square root of 61368618 is about 7833.8124817997. The cubic root of 61368618 is about 394.4410574389.

The spelling of 61368618 in words is "sixty-one million, three hundred sixty-eight thousand, six hundred eighteen".