78025825 has 6 divisors (see below), whose sum is σ = 96752054. Its totient is φ = 62420640.

The previous prime is 78025823. The next prime is 78025877. The reversal of 78025825 is 52852087.

It can be written as a sum of positive squares in 3 ways, for example, as 18905104 + 59120721 = 4348^2 + 7689^2 .

It is not a de Polignac number, because 78025825 - 2¹ = 78025823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78025823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1560492 + ... + 1560541.

Almost surely, 2^78025825 is an apocalyptic number.

It is an amenable number.

78025825 is a deficient number, since it is larger than the sum of its proper divisors (18726229).

78025825 is a wasteful number, since it uses less digits than its factorization.

78025825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121043 (or 3121038 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 78025825 is about 8833.2227980506. Note that the first 3 decimals coincide. The cubic root of 78025825 is about 427.3130174155.

The spelling of 78025825 in words is "seventy-eight million, twenty-five thousand, eight hundred twenty-five".