72453431189 has 2 divisors, whose sum is σ = 72453431190. Its totient is φ = 72453431188.

The previous prime is 72453431161. The next prime is 72453431201. The reversal of 72453431189 is 98113435427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51703028689 + 20750402500 = 227383^2 + 144050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72453431189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72453431119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36226715594 + 36226715595.

It is an arithmetic number, because the mean of its divisors is an integer number (36226715595).

Almost surely, 2^72453431189 is an apocalyptic number.

It is an amenable number.

72453431189 is a deficient number, since it is larger than the sum of its proper divisors (1).

72453431189 is an equidigital number, since it uses as much as digits as its factorization.

72453431189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The spelling of 72453431189 in words is "seventy-two billion, four hundred fifty-three million, four hundred thirty-one thousand, one hundred eighty-nine".