72148855417 has 2 divisors, whose sum is σ = 72148855418. Its totient is φ = 72148855416.

The previous prime is 72148855409. The next prime is 72148855447. The reversal of 72148855417 is 71455884127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68863731561 + 3285123856 = 262419^2 + 57316^2 .

It is an emirp because it is prime and its reverse (71455884127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72148855417 - 2³ = 72148855409 is a prime.

It is not a weakly prime, because it can be changed into another prime (72148855447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36074427708 + 36074427709.

It is an arithmetic number, because the mean of its divisors is an integer number (36074427709).

Almost surely, 2^72148855417 is an apocalyptic number.

It is an amenable number.

72148855417 is a deficient number, since it is larger than the sum of its proper divisors (1).

72148855417 is an equidigital number, since it uses as much as digits as its factorization.

72148855417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2508800, while the sum is 52.

The spelling of 72148855417 in words is "seventy-two billion, one hundred forty-eight million, eight hundred fifty-five thousand, four hundred seventeen".