78325528025 has 6 divisors (see below), whose sum is σ = 97123654782. Its totient is φ = 62660422400.

The previous prime is 78325528019. The next prime is 78325528027. The reversal of 78325528025 is 52082552387.

It can be written as a sum of positive squares in 3 ways, for example, as 10860140944 + 67465387081 = 104212^2 + 259741^2 .

It is not a de Polignac number, because 78325528025 - 2⁶ = 78325527961 is a prime.

It is a super-2 number, since 2×78325528025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78325528027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1566510536 + ... + 1566510585.

It is an arithmetic number, because the mean of its divisors is an integer number (16187275797).

Almost surely, 2^78325528025 is an apocalyptic number.

It is an amenable number.

78325528025 is a deficient number, since it is larger than the sum of its proper divisors (18798126757).

78325528025 is a wasteful number, since it uses less digits than its factorization.

78325528025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133021131 (or 3133021126 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 78325528025 in words is "seventy-eight billion, three hundred twenty-five million, five hundred twenty-eight thousand, twenty-five".