78046641 has 12 divisors (see below), whose sum is σ = 112848580. Its totient is φ = 51978240.

The previous prime is 78046637. The next prime is 78046651. The reversal of 78046641 is 14664087.

78046641 is a `hidden beast` number, since 7 + 8 + 0 + 4 + 6 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28132416 + 49914225 = 5304^2 + 7065^2 .

It is not a de Polignac number, because 78046641 - 2² = 78046637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78046596 and 78046605.

It is not an unprimeable number, because it can be changed into a prime (78046601) 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, 6321 + ... + 14001.

Almost surely, 2^78046641 is an apocalyptic number.

It is an amenable number.

78046641 is a deficient number, since it is larger than the sum of its proper divisors (34801939).

78046641 is a wasteful number, since it uses less digits than its factorization.

78046641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8816 (or 8813 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 78046641 is about 8834.4009983700. The cubic root of 78046641 is about 427.3510140527.

It can be divided in two parts, 78046 and 641, that added together give a palindrome (78687).

The spelling of 78046641 in words is "seventy-eight million, forty-six thousand, six hundred forty-one".