77918345 has 8 divisors (see below), whose sum is σ = 96518400. Its totient is φ = 60323760.

The previous prime is 77918317. The next prime is 77918353. The reversal of 77918345 is 54381977.

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

It is a de Polignac number, because none of the positive numbers 2^k-77918345 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77918296 and 77918305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251195 + ... + 251504.

It is an arithmetic number, because the mean of its divisors is an integer number (12064800).

Almost surely, 2^77918345 is an apocalyptic number.

It is an amenable number.

77918345 is a deficient number, since it is larger than the sum of its proper divisors (18600055).

77918345 is a wasteful number, since it uses less digits than its factorization.

77918345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502735.

The product of its digits is 211680, while the sum is 44.

The square root of 77918345 is about 8827.1368517770. The cubic root of 77918345 is about 427.1167204093.

The spelling of 77918345 in words is "seventy-seven million, nine hundred eighteen thousand, three hundred forty-five".