73934821980 has 480 divisors, whose sum is σ = 255144859200. Its totient is φ = 17850212352.

The previous prime is 73934821969. The next prime is 73934822023. The reversal of 73934821980 is 8912843937.

73934821980 is a `hidden beast` number, since 7 + 3 + 9 + 348 + 219 + 80 = 666.

It is a super-2 number, since 2×73934821980² (a number of 23 digits) contains 22 as substring.

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 159 ways as a sum of consecutive naturals, for example, 100865694 + ... + 100866426.

It is an arithmetic number, because the mean of its divisors is an integer number (531551790).

Almost surely, 2^73934821980 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 73934821980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127572429600).

73934821980 is an abundant number, since it is smaller than the sum of its proper divisors (181210037220).

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

73934821980 is a wasteful number, since it uses less digits than its factorization.

73934821980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 73934821980 in words is "seventy-three billion, nine hundred thirty-four million, eight hundred twenty-one thousand, nine hundred eighty".