73128583376 has 40 divisors (see below), whose sum is σ = 144455519880. Its totient is φ = 35850653696.

The previous prime is 73128583357. The next prime is 73128583379. The reversal of 73128583376 is 67338582137.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 433638976 + 72694944400 = 20824^2 + 269620^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73128583379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1289180 + ... + 1344708.

It is an arithmetic number, because the mean of its divisors is an integer number (3611387997).

Almost surely, 2^73128583376 is an apocalyptic number.

It is an amenable number.

73128583376 is a deficient number, since it is larger than the sum of its proper divisors (71326936504).

73128583376 is a wasteful number, since it uses less digits than its factorization.

73128583376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57143 (or 57137 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 53.

The spelling of 73128583376 in words is "seventy-three billion, one hundred twenty-eight million, five hundred eighty-three thousand, three hundred seventy-six".