78501512207811 has 32 divisors (see below), whose sum is σ = 134022939775488. Its totient is φ = 39677844003840.

The previous prime is 78501512207761. The next prime is 78501512207843. The reversal of 78501512207811 is 11870221510587.

It is not a de Polignac number, because 78501512207811 - 2⁹ = 78501512207299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78501512207861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4592334510 + ... + 4592351603.

It is an arithmetic number, because the mean of its divisors is an integer number (4188216867984).

Almost surely, 2^{78501512207811} is an apocalyptic number.

78501512207811 is a deficient number, since it is larger than the sum of its proper divisors (55521427567677).

78501512207811 is a wasteful number, since it uses less digits than its factorization.

78501512207811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9184686171.

The product of its (nonzero) digits is 313600, while the sum is 48.

The spelling of 78501512207811 in words is "seventy-eight trillion, five hundred one billion, five hundred twelve million, two hundred seven thousand, eight hundred eleven".