72807321451 has 2 divisors, whose sum is σ = 72807321452. Its totient is φ = 72807321450.

The previous prime is 72807321373. The next prime is 72807321479. The reversal of 72807321451 is 15412370827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72807321451 - 2¹³ = 72807313259 is a prime.

It is not a weakly prime, because it can be changed into another prime (72807321151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36403660725 + 36403660726.

It is an arithmetic number, because the mean of its divisors is an integer number (36403660726).

Almost surely, 2^72807321451 is an apocalyptic number.

72807321451 is a deficient number, since it is larger than the sum of its proper divisors (1).

72807321451 is an equidigital number, since it uses as much as digits as its factorization.

72807321451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 72807321451 in words is "seventy-two billion, eight hundred seven million, three hundred twenty-one thousand, four hundred fifty-one".