72865071427 has 2 divisors, whose sum is σ = 72865071428. Its totient is φ = 72865071426.

The previous prime is 72865071403. The next prime is 72865071439. The reversal of 72865071427 is 72417056827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72865071427 is a prime.

It is not a weakly prime, because it can be changed into another prime (72865071467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36432535713 + 36432535714.

It is an arithmetic number, because the mean of its divisors is an integer number (36432535714).

Almost surely, 2^72865071427 is an apocalyptic number.

72865071427 is a deficient number, since it is larger than the sum of its proper divisors (1).

72865071427 is an equidigital number, since it uses as much as digits as its factorization.

72865071427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 72865071427 in words is "seventy-two billion, eight hundred sixty-five million, seventy-one thousand, four hundred twenty-seven".