77321625 has 16 divisors (see below), whose sum is σ = 128663808. Its totient is φ = 41238000.

The previous prime is 77321623. The next prime is 77321639. The reversal of 77321625 is 52612377.

It is not a de Polignac number, because 77321625 - 2¹ = 77321623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77321623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102721 + ... + 103470.

It is an arithmetic number, because the mean of its divisors is an integer number (8041488).

Almost surely, 2^77321625 is an apocalyptic number.

77321625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77321625 is a deficient number, since it is larger than the sum of its proper divisors (51342183).

77321625 is a wasteful number, since it uses less digits than its factorization.

77321625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206209 (or 206199 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 77321625 is about 8793.2715754718. The cubic root of 77321625 is about 426.0235996095.

The spelling of 77321625 in words is "seventy-seven million, three hundred twenty-one thousand, six hundred twenty-five".