61339494528 has 384 divisors, whose sum is σ = 194275972800. Its totient is φ = 18463334400.

The previous prime is 61339494523. The next prime is 61339494533. The reversal of 61339494528 is 82549493316.

It is an interprime number because it is at equal distance from previous prime (61339494523) and next prime (61339494533).

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (61339494521) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 161845443 + ... + 161845821.

Almost surely, 2^61339494528 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 61339494528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97137986400).

61339494528 is an abundant number, since it is smaller than the sum of its proper divisors (132936478272).

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

61339494528 is a wasteful number, since it uses less digits than its factorization.

61339494528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 605 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 61339494528 in words is "sixty-one billion, three hundred thirty-nine million, four hundred ninety-four thousand, five hundred twenty-eight".