78951805543 has 12 divisors (see below), whose sum is σ = 87480390360. Its totient is φ = 71183732256.

The previous prime is 78951805529. The next prime is 78951805549. The reversal of 78951805543 is 34550815987.

It is not a de Polignac number, because 78951805543 - 2³³ = 70361870951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78951805549) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5424948 + ... + 5439481.

It is an arithmetic number, because the mean of its divisors is an integer number (7290032530).

Almost surely, 2^78951805543 is an apocalyptic number.

78951805543 is a deficient number, since it is larger than the sum of its proper divisors (8528584817).

78951805543 is a wasteful number, since it uses less digits than its factorization.

78951805543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10864498 (or 10864485 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 78951805543 in words is "seventy-eight billion, nine hundred fifty-one million, eight hundred five thousand, five hundred forty-three".