78036920885 has 64 divisors (see below), whose sum is σ = 118920960000. Its totient is φ = 47745849600.

The previous prime is 78036920879. The next prime is 78036920933. The reversal of 78036920885 is 58802963087.

It is not a de Polignac number, because 78036920885 - 2²⁰ = 78035872309 is a prime.

It is a super-2 number, since 2×78036920885² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78036920885.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11715686 + ... + 11722344.

It is an arithmetic number, because the mean of its divisors is an integer number (1858140000).

Almost surely, 2^78036920885 is an apocalyptic number.

It is an amenable number.

78036920885 is a deficient number, since it is larger than the sum of its proper divisors (40884039115).

78036920885 is a wasteful number, since it uses less digits than its factorization.

78036920885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 78036920885 in words is "seventy-eight billion, thirty-six million, nine hundred twenty thousand, eight hundred eighty-five".