78065625 has 48 divisors (see below), whose sum is σ = 142115904. Its totient is φ = 37800000.

The previous prime is 78065591. The next prime is 78065639. The reversal of 78065625 is 52656087.

It is a happy number.

It is not a de Polignac number, because 78065625 - 2⁸ = 78065369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102747 + ... + 103503.

It is an arithmetic number, because the mean of its divisors is an integer number (2960748).

Almost surely, 2^78065625 is an apocalyptic number.

78065625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78065625 is a deficient number, since it is larger than the sum of its proper divisors (64050279).

78065625 is an equidigital number, since it uses as much as digits as its factorization.

78065625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 78065625 is about 8835.4753692147. The cubic root of 78065625 is about 427.3856607453.

It can be divided in two parts, 7806 and 5625, that added together give a palindrome (13431).

The spelling of 78065625 in words is "seventy-eight million, sixty-five thousand, six hundred twenty-five".