61318464 has 56 divisors (see below), whose sum is σ = 165018720. Its totient is φ = 20089344.

The previous prime is 61318451. The next prime is 61318471. The reversal of 61318464 is 46481316.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8622 + ... + 14034.

Almost surely, 2^61318464 is an apocalyptic number.

61318464 is a gapful number since it is divisible by the number (64) 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 61318464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82509360).

61318464 is an abundant number, since it is smaller than the sum of its proper divisors (103700256).

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

61318464 is a wasteful number, since it uses less digits than its factorization.

61318464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487 (or 5477 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 61318464 is about 7830.6107041533. The cubic root of 61318464 is about 394.3335747705. Note that the first 3 decimals are identical.

The spelling of 61318464 in words is "sixty-one million, three hundred eighteen thousand, four hundred sixty-four".