78507241181811 has 12 divisors (see below), whose sum is σ = 122122375171888. Its totient is φ = 48312148419504.

The previous prime is 78507241181807. The next prime is 78507241181813. The reversal of 78507241181811 is 11818114270587.

78507241181811 is a `hidden beast` number, since 7 + 8 + 5 + 0 + 72 + 411 + 81 + 81 + 1 = 666.

It is not a de Polignac number, because 78507241181811 - 2² = 78507241181807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78507241181813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335501030575 + ... + 335501030808.

Almost surely, 2^{78507241181811} is an apocalyptic number.

78507241181811 is a deficient number, since it is larger than the sum of its proper divisors (43615133990077).

78507241181811 is a wasteful number, since it uses less digits than its factorization.

78507241181811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671002061402 (or 671002061399 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 54.

The spelling of 78507241181811 in words is "seventy-eight trillion, five hundred seven billion, two hundred forty-one million, one hundred eighty-one thousand, eight hundred eleven".