61724716312 has 72 divisors (see below), whose sum is σ = 138367334700. Its totient is φ = 25738267968.

The previous prime is 61724716241. The next prime is 61724716343. The reversal of 61724716312 is 21361742716.

61724716312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 479139 + ... + 594157.

Almost surely, 2^61724716312 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 61724716312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69183667350).

61724716312 is an abundant number, since it is smaller than the sum of its proper divisors (76642618388).

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

61724716312 is a wasteful number, since it uses less digits than its factorization.

61724716312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115113 (or 115065 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The spelling of 61724716312 in words is "sixty-one billion, seven hundred twenty-four million, seven hundred sixteen thousand, three hundred twelve".