78248281673225 has 12 divisors (see below), whose sum is σ = 102735390997404. Its totient is φ = 58916353259520.

The previous prime is 78248281673207. The next prime is 78248281673249. The reversal of 78248281673225 is 52237618284287.

It can be written as a sum of positive squares in 6 ways, for example, as 7839266417161 + 70409015256064 = 2799869^2 + 8391008^2 .

It is not a de Polignac number, because 78248281673225 - 2⁴⁴ = 60656095628809 is a prime.

It is a super-2 number, since 2×78248281673225² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92056801544 + ... + 92056802393.

It is an arithmetic number, because the mean of its divisors is an integer number (8561282583117).

Almost surely, 2^{78248281673225} is an apocalyptic number.

It is an amenable number.

78248281673225 is a deficient number, since it is larger than the sum of its proper divisors (24487109324179).

78248281673225 is a wasteful number, since it uses less digits than its factorization.

78248281673225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184113603964 (or 184113603959 counting only the distinct ones).

The product of its digits is 144506880, while the sum is 65.

The spelling of 78248281673225 in words is "seventy-eight trillion, two hundred forty-eight billion, two hundred eighty-one million, six hundred seventy-three thousand, two hundred twenty-five".