77480845 has 8 divisors (see below), whose sum is σ = 100129176. Its totient is φ = 57216576.

The previous prime is 77480839. The next prime is 77480891. The reversal of 77480845 is 54808477.

It can be written as a sum of positive squares in 4 ways, for example, as 9616201 + 67864644 = 3101^2 + 8238^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 77480845 - 2²⁵ = 43926413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595942 + ... + 596071.

It is an arithmetic number, because the mean of its divisors is an integer number (12516147).

Almost surely, 2^77480845 is an apocalyptic number.

It is an amenable number.

77480845 is a deficient number, since it is larger than the sum of its proper divisors (22648331).

77480845 is a wasteful number, since it uses less digits than its factorization.

77480845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192031.

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 77480845 is about 8802.3204327041. The cubic root of 77480845 is about 426.3158204529.

The spelling of 77480845 in words is "seventy-seven million, four hundred eighty thousand, eight hundred forty-five".