61619976 has 96 divisors (see below), whose sum is σ = 183849120. Its totient is φ = 18643680.

The previous prime is 61619969. The next prime is 61619981. The reversal of 61619976 is 67991616.

61619976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95511 + ... + 96153.

It is an arithmetic number, because the mean of its divisors is an integer number (1915095).

Almost surely, 2^61619976 is an apocalyptic number.

61619976 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61619976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91924560).

61619976 is an abundant number, since it is smaller than the sum of its proper divisors (122229144).

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

61619976 is a wasteful number, since it uses less digits than its factorization.

61619976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 659 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 61619976 is about 7849.8392340226. The cubic root of 61619976 is about 394.9788505474.

The spelling of 61619976 in words is "sixty-one million, six hundred nineteen thousand, nine hundred seventy-six".