73120865616 has 120 divisors (see below), whose sum is σ = 212481962784. Its totient is φ = 24343079040.

The previous prime is 73120865603. The next prime is 73120865663. The reversal of 73120865616 is 61656802137.

73120865616 is a `hidden beast` number, since 7 + 3 + 1 + 2 + 0 + 86 + 561 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3204006 + ... + 3226746.

Almost surely, 2^73120865616 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 73120865616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106240981392).

73120865616 is an abundant number, since it is smaller than the sum of its proper divisors (139361097168).

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

73120865616 is a wasteful number, since it uses less digits than its factorization.

73120865616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23591 (or 23573 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 73120865616 in words is "seventy-three billion, one hundred twenty million, eight hundred sixty-five thousand, six hundred sixteen".