78530321370225 has 24 divisors (see below), whose sum is σ = 129837073734720. Its totient is φ = 41882749117120.

The previous prime is 78530321370167. The next prime is 78530321370269. The reversal of 78530321370225 is 52207312303587.

It is not a de Polignac number, because 78530321370225 - 2¹³ = 78530321362033 is a prime.

It is a super-2 number, since 2×78530321370225² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49999171 + ... + 51545879.

It is an arithmetic number, because the mean of its divisors is an integer number (5409878072280).

Almost surely, 2^{78530321370225} is an apocalyptic number.

78530321370225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78530321370225 is a deficient number, since it is larger than the sum of its proper divisors (51306752364495).

78530321370225 is a wasteful number, since it uses less digits than its factorization.

78530321370225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223689 (or 2223684 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 78530321370225 in words is "seventy-eight trillion, five hundred thirty billion, three hundred twenty-one million, three hundred seventy thousand, two hundred twenty-five".