73647278231 has 2 divisors, whose sum is σ = 73647278232. Its totient is φ = 73647278230.

The previous prime is 73647278191. The next prime is 73647278233. The reversal of 73647278231 is 13287274637.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73647278231 - 2¹⁴ = 73647261847 is a prime.

It is a super-2 number, since 2×73647278231² (a number of 23 digits) contains 22 as substring.

Together with 73647278233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73647278231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73647278233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36823639115 + 36823639116.

It is an arithmetic number, because the mean of its divisors is an integer number (36823639116).

Almost surely, 2^73647278231 is an apocalyptic number.

73647278231 is a deficient number, since it is larger than the sum of its proper divisors (1).

73647278231 is an equidigital number, since it uses as much as digits as its factorization.

73647278231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 50.

The spelling of 73647278231 in words is "seventy-three billion, six hundred forty-seven million, two hundred seventy-eight thousand, two hundred thirty-one".