65613071250 has 160 divisors (see below), whose sum is σ = 187128099840. Its totient is φ = 17023608000.

The previous prime is 65613071243. The next prime is 65613071291. The reversal of 65613071250 is 5217031656.

65613071250 is a `hidden beast` number, since 6 + 561 + 3 + 0 + 71 + 25 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1222479 + ... + 1275021.

It is an arithmetic number, because the mean of its divisors is an integer number (1169550624).

Almost surely, 2^65613071250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65613071250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93564049920).

65613071250 is an abundant number, since it is smaller than the sum of its proper divisors (121515028590).

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

65613071250 is a wasteful number, since it uses less digits than its factorization.

65613071250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52611 (or 52590 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 65613071250 in words is "sixty-five billion, six hundred thirteen million, seventy-one thousand, two hundred fifty".