61344978 has 16 divisors (see below), whose sum is σ = 123228480. Its totient is φ = 20358576.

The previous prime is 61344949. The next prime is 61344989. The reversal of 61344978 is 87944316.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20950 + ... + 23697.

It is an arithmetic number, because the mean of its divisors is an integer number (7701780).

Almost surely, 2^61344978 is an apocalyptic number.

61344978 is an abundant number, since it is smaller than the sum of its proper divisors (61883502).

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

61344978 is a wasteful number, since it uses less digits than its factorization.

61344978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44881.

The product of its digits is 145152, while the sum is 42.

The square root of 61344978 is about 7832.3034925876. The cubic root of 61344978 is about 394.3904029705.

The spelling of 61344978 in words is "sixty-one million, three hundred forty-four thousand, nine hundred seventy-eight".