78328028325 has 12 divisors (see below), whose sum is σ = 129502340288. Its totient is φ = 41774948400.

The previous prime is 78328028293. The next prime is 78328028329. The reversal of 78328028325 is 52382082387.

It is not a de Polignac number, because 78328028325 - 2⁵ = 78328028293 is a prime.

It is a super-2 number, since 2×78328028325² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78328028329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522186781 + ... + 522186930.

Almost surely, 2^78328028325 is an apocalyptic number.

78328028325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78328028325 is a deficient number, since it is larger than the sum of its proper divisors (51174311963).

78328028325 is a wasteful number, since it uses less digits than its factorization.

78328028325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044373724 (or 1044373719 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 78328028325 in words is "seventy-eight billion, three hundred twenty-eight million, twenty-eight thousand, three hundred twenty-five".