73172392451 has 2 divisors, whose sum is σ = 73172392452. Its totient is φ = 73172392450.

The previous prime is 73172392379. The next prime is 73172392453. The reversal of 73172392451 is 15429327137.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73172392451 is a prime.

Together with 73172392453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73172392453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36586196225 + 36586196226.

It is an arithmetic number, because the mean of its divisors is an integer number (36586196226).

Almost surely, 2^73172392451 is an apocalyptic number.

73172392451 is a deficient number, since it is larger than the sum of its proper divisors (1).

73172392451 is an equidigital number, since it uses as much as digits as its factorization.

73172392451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 44.

The spelling of 73172392451 in words is "seventy-three billion, one hundred seventy-two million, three hundred ninety-two thousand, four hundred fifty-one".