61628757684 has 96 divisors (see below), whose sum is σ = 156035894784. Its totient is φ = 18819440640.

The previous prime is 61628757677. The next prime is 61628757719. The reversal of 61628757684 is 48675782616.

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, 13937794 + ... + 13942214.

It is an arithmetic number, because the mean of its divisors is an integer number (1625373904).

Almost surely, 2^61628757684 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 61628757684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78017947392).

61628757684 is an abundant number, since it is smaller than the sum of its proper divisors (94407137100).

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

61628757684 is a wasteful number, since it uses less digits than its factorization.

61628757684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097 (or 5095 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 60.

The spelling of 61628757684 in words is "sixty-one billion, six hundred twenty-eight million, seven hundred fifty-seven thousand, six hundred eighty-four".