78516441 has 12 divisors (see below), whose sum is σ = 114849280. Its totient is φ = 51681240.

The previous prime is 78516437. The next prime is 78516469. The reversal of 78516441 is 14461587.

It is a happy number.

78516441 is a `hidden beast` number, since 7 + 8 + 5 + 1 + 644 + 1 = 666.

It is not a de Polignac number, because 78516441 - 2² = 78516437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78516396 and 78516405.

It is not an unprimeable number, because it can be changed into a prime (78516241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54505 + ... + 55926.

Almost surely, 2^78516441 is an apocalyptic number.

It is an amenable number.

78516441 is a deficient number, since it is larger than the sum of its proper divisors (36332839).

78516441 is a wasteful number, since it uses less digits than its factorization.

78516441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110516 (or 110513 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 78516441 is about 8860.9503440658. The cubic root of 78516441 is about 428.2067758686.

The spelling of 78516441 in words is "seventy-eight million, five hundred sixteen thousand, four hundred forty-one".