65618444628 has 96 divisors (see below), whose sum is σ = 185662081920. Its totient is φ = 19876389120.

The previous prime is 65618444603. The next prime is 65618444659. The reversal of 65618444628 is 82644481656.

65618444628 is a `hidden beast` number, since 6 + 5 + 6 + 1 + 8 + 4 + 4 + 4 + 628 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3384450 + ... + 3403782.

It is an arithmetic number, because the mean of its divisors is an integer number (1933980020).

Almost surely, 2^65618444628 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 65618444628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92831040960).

65618444628 is an abundant number, since it is smaller than the sum of its proper divisors (120043637292).

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

65618444628 is a wasteful number, since it uses less digits than its factorization.

65618444628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22214 (or 22206 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 54.

The spelling of 65618444628 in words is "sixty-five billion, six hundred eighteen million, four hundred forty-four thousand, six hundred twenty-eight".