61234702520 has 128 divisors (see below), whose sum is σ = 149300236800. Its totient is φ = 22524397056.

The previous prime is 61234702519. The next prime is 61234702531. The reversal of 61234702520 is 2520743216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13129709 + ... + 13134371.

It is an arithmetic number, because the mean of its divisors is an integer number (1166408100).

Almost surely, 2^61234702520 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 61234702520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74650118400).

61234702520 is an abundant number, since it is smaller than the sum of its proper divisors (88065534280).

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

61234702520 is a wasteful number, since it uses less digits than its factorization.

61234702520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 61234702520 in words is "sixty-one billion, two hundred thirty-four million, seven hundred two thousand, five hundred twenty".