78967741778505 has 24 divisors (see below), whose sum is σ = 137642097415680. Its totient is φ = 41880843307680.

The previous prime is 78967741778459. The next prime is 78967741778543. The reversal of 78967741778505 is 50587714776987.

78967741778505 is a `hidden beast` number, since 7 + 8 + 9 + 67 + 7 + 41 + 7 + 7 + 8 + 505 = 666.

It is not a de Polignac number, because 78967741778505 - 2²² = 78967737584201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4901776041 + ... + 4901792150.

It is an arithmetic number, because the mean of its divisors is an integer number (5735087392320).

Almost surely, 2^{78967741778505} is an apocalyptic number.

It is an amenable number.

78967741778505 is a deficient number, since it is larger than the sum of its proper divisors (58674355637175).

78967741778505 is a wasteful number, since it uses less digits than its factorization.

78967741778505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9803568381 (or 9803568378 counting only the distinct ones).

The product of its (nonzero) digits is 5808499200, while the sum is 81.

The spelling of 78967741778505 in words is "seventy-eight trillion, nine hundred sixty-seven billion, seven hundred forty-one million, seven hundred seventy-eight thousand, five hundred five".