61616464 has 80 divisors (see below), whose sum is σ = 148740480. Its totient is φ = 24076800.

The previous prime is 61616419. The next prime is 61616479. The reversal of 61616464 is 46461616.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 146847 + ... + 147265.

It is an arithmetic number, because the mean of its divisors is an integer number (1859256).

Almost surely, 2^61616464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61616464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74370240).

61616464 is an abundant number, since it is smaller than the sum of its proper divisors (87124016).

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

61616464 is a wasteful number, since it uses less digits than its factorization.

61616464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 542 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 61616464 is about 7849.6155319863. The cubic root of 61616464 is about 394.9713465302.

The spelling of 61616464 in words is "sixty-one million, six hundred sixteen thousand, four hundred sixty-four".