72450251273 has 2 divisors, whose sum is σ = 72450251274. Its totient is φ = 72450251272.

The previous prime is 72450251239. The next prime is 72450251369. The reversal of 72450251273 is 37215205427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69588857209 + 2861394064 = 263797^2 + 53492^2 .

It is a cyclic number.

It is not a de Polignac number, because 72450251273 - 2⁸ = 72450251017 is a prime.

It is not a weakly prime, because it can be changed into another prime (72450251773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36225125636 + 36225125637.

It is an arithmetic number, because the mean of its divisors is an integer number (36225125637).

Almost surely, 2^72450251273 is an apocalyptic number.

It is an amenable number.

72450251273 is a deficient number, since it is larger than the sum of its proper divisors (1).

72450251273 is an equidigital number, since it uses as much as digits as its factorization.

72450251273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 72450251273 in words is "seventy-two billion, four hundred fifty million, two hundred fifty-one thousand, two hundred seventy-three".