73113721856 has 352 divisors, whose sum is σ = 194405391360. Its totient is φ = 26704871424.

The previous prime is 73113721823. The next prime is 73113721871. The reversal of 73113721856 is 65812731137.

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, 53250386 + ... + 53251758.

Almost surely, 2^73113721856 is an apocalyptic number.

73113721856 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73113721856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97202695680).

73113721856 is an abundant number, since it is smaller than the sum of its proper divisors (121291669504).

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

73113721856 is a wasteful number, since it uses less digits than its factorization.

73113721856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459 (or 1441 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The spelling of 73113721856 in words is "seventy-three billion, one hundred thirteen million, seven hundred twenty-one thousand, eight hundred fifty-six".