61304723568 has 180 divisors, whose sum is σ = 194668137664. Its totient is φ = 17977766400.

The previous prime is 61304723567. The next prime is 61304723569. The reversal of 61304723568 is 86532740316.

61304723568 is a `hidden beast` number, since 6 + 13 + 0 + 4 + 72 + 3 + 568 = 666.

It is an interprime number because it is at equal distance from previous prime (61304723567) and next prime (61304723569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61304723563) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 483396 + ... + 596892.

Almost surely, 2^61304723568 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 61304723568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97334068832).

61304723568 is an abundant number, since it is smaller than the sum of its proper divisors (133363414096).

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

61304723568 is a wasteful number, since it uses less digits than its factorization.

61304723568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113564 (or 113544 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 61304723568 in words is "sixty-one billion, three hundred four million, seven hundred twenty-three thousand, five hundred sixty-eight".