77625505 has 8 divisors (see below), whose sum is σ = 95422824. Its totient is φ = 60585600.

The previous prime is 77625503. The next prime is 77625517. The reversal of 77625505 is 50552677.

It can be written as a sum of positive squares in 4 ways, for example, as 6796449 + 70829056 = 2607^2 + 8416^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77625505 - 2¹ = 77625503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77625503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189126 + ... + 189535.

It is an arithmetic number, because the mean of its divisors is an integer number (11927853).

Almost surely, 2^77625505 is an apocalyptic number.

It is an amenable number.

77625505 is a deficient number, since it is larger than the sum of its proper divisors (17797319).

77625505 is a wasteful number, since it uses less digits than its factorization.

77625505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378707.

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 77625505 is about 8810.5337522763. The cubic root of 77625505 is about 426.5809720339.

The spelling of 77625505 in words is "seventy-seven million, six hundred twenty-five thousand, five hundred five".