61518678 has 16 divisors (see below), whose sum is σ = 132501936. Its totient is φ = 18928800.

The previous prime is 61518671. The next prime is 61518703. The reversal of 61518678 is 87681516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61518671) 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, 394273 + ... + 394428.

It is an arithmetic number, because the mean of its divisors is an integer number (8281371).

Almost surely, 2^61518678 is an apocalyptic number.

61518678 is an abundant number, since it is smaller than the sum of its proper divisors (70983258).

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

61518678 is a wasteful number, since it uses less digits than its factorization.

61518678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788719.

The product of its digits is 80640, while the sum is 42.

The square root of 61518678 is about 7843.3843460588. The cubic root of 61518678 is about 394.7622946245.

The spelling of 61518678 in words is "sixty-one million, five hundred eighteen thousand, six hundred seventy-eight".