61408018 has 16 divisors (see below), whose sum is σ = 105525504. Its totient is φ = 26254080.

The previous prime is 61408013. The next prime is 61408021. The reversal of 61408018 is 81080416.

It is not an unprimeable number, because it can be changed into a prime (61408013) 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, 946 + ... + 11122.

It is an arithmetic number, because the mean of its divisors is an integer number (6595344).

Almost surely, 2^61408018 is an apocalyptic number.

61408018 is a deficient number, since it is larger than the sum of its proper divisors (44117486).

61408018 is a wasteful number, since it uses less digits than its factorization.

61408018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10617.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 61408018 is about 7836.3268180953. The cubic root of 61408018 is about 394.5254526530.

The spelling of 61408018 in words is "sixty-one million, four hundred eight thousand, eighteen".