72431613427 has 2 divisors, whose sum is σ = 72431613428. Its totient is φ = 72431613426.

The previous prime is 72431613407. The next prime is 72431613467.

72431613427 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (72431613467) can be obtained adding 72431613427 to its sum of digits (40).

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 72431613427 - 2¹⁹ = 72431089139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72431613427.

It is not a weakly prime, because it can be changed into another prime (72431613407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36215806713 + 36215806714.

It is an arithmetic number, because the mean of its divisors is an integer number (36215806714).

Almost surely, 2^72431613427 is an apocalyptic number.

72431613427 is a deficient number, since it is larger than the sum of its proper divisors (1).

72431613427 is an equidigital number, since it uses as much as digits as its factorization.

72431613427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The spelling of 72431613427 in words is "seventy-two billion, four hundred thirty-one million, six hundred thirteen thousand, four hundred twenty-seven".