61646822730 has 96 divisors (see below), whose sum is σ = 169949145600. Its totient is φ = 15450349056.

The previous prime is 61646822707. The next prime is 61646822759. The reversal of 61646822730 is 3722864616.

61646822730 is a `hidden beast` number, since 616 + 4 + 6 + 8 + 2 + 27 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1072051 + ... + 1128089.

It is an arithmetic number, because the mean of its divisors is an integer number (1770303600).

Almost surely, 2^61646822730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61646822730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84974572800).

61646822730 is an abundant number, since it is smaller than the sum of its proper divisors (108302322870).

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

61646822730 is a wasteful number, since it uses less digits than its factorization.

61646822730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56788 (or 56785 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 61646822730 in words is "sixty-one billion, six hundred forty-six million, eight hundred twenty-two thousand, seven hundred thirty".