61918974 has 48 divisors (see below), whose sum is σ = 145886832. Its totient is φ = 18866304.

The previous prime is 61918951. The next prime is 61919003. The reversal of 61918974 is 47981916.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23802 + ... + 26274.

It is an arithmetic number, because the mean of its divisors is an integer number (3039309).

Almost surely, 2^61918974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61918974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72943416).

61918974 is an abundant number, since it is smaller than the sum of its proper divisors (83967858).

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

61918974 is a wasteful number, since it uses less digits than its factorization.

61918974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601 (or 2598 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 61918974 is about 7868.8610357535. The cubic root of 61918974 is about 395.6166706841.

The spelling of 61918974 in words is "sixty-one million, nine hundred eighteen thousand, nine hundred seventy-four".