73129139776 has 189 divisors, whose sum is σ = 185972899707. Its totient is φ = 28426970880.

The previous prime is 73129139773. The next prime is 73129139801. The reversal of 73129139776 is 67793192137.

The square root of 73129139776 is 270424.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (73129139771) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 166580965 + ... + 166581403.

Almost surely, 2^73129139776 is an apocalyptic number.

73129139776 is the 270424-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73129139776

73129139776 is an abundant number, since it is smaller than the sum of its proper divisors (112843759931).

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

73129139776 is an equidigital number, since it uses as much as digits as its factorization.

73129139776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 459 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 55.

The spelling of 73129139776 in words is "seventy-three billion, one hundred twenty-nine million, one hundred thirty-nine thousand, seven hundred seventy-six".