73172555072671 has 4 divisors (see below), whose sum is σ = 73211663869344. Its totient is φ = 73133446276000.

The previous prime is 73172555072569. The next prime is 73172555072677. The reversal of 73172555072671 is 17627055527137.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73172555072671 - 2⁷ = 73172555072543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73172555072677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19554395530 + ... + 19554399271.

It is an arithmetic number, because the mean of its divisors is an integer number (18302915967336).

Almost surely, 2^{73172555072671} is an apocalyptic number.

73172555072671 is a deficient number, since it is larger than the sum of its proper divisors (39108796673).

73172555072671 is a wasteful number, since it uses less digits than its factorization.

73172555072671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39108796672.

The product of its (nonzero) digits is 21609000, while the sum is 58.

The spelling of 73172555072671 in words is "seventy-three trillion, one hundred seventy-two billion, five hundred fifty-five million, seventy-two thousand, six hundred seventy-one".