77798625 has 16 divisors (see below), whose sum is σ = 129457536. Its totient is φ = 41492400.

The previous prime is 77798621. The next prime is 77798629. The reversal of 77798625 is 52689777.

It is an interprime number because it is at equal distance from previous prime (77798621) and next prime (77798629).

It is not a de Polignac number, because 77798625 - 2² = 77798621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77798621) 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, 103357 + ... + 104106.

It is an arithmetic number, because the mean of its divisors is an integer number (8091096).

Almost surely, 2^77798625 is an apocalyptic number.

77798625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77798625 is a deficient number, since it is larger than the sum of its proper divisors (51658911).

77798625 is a wasteful number, since it uses less digits than its factorization.

77798625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207481 (or 207471 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 51.

The square root of 77798625 is about 8820.3528840971. The cubic root of 77798625 is about 426.8978561390.

The spelling of 77798625 in words is "seventy-seven million, seven hundred ninety-eight thousand, six hundred twenty-five".