78743546873 has 4 divisors (see below), whose sum is σ = 79918823760. Its totient is φ = 77568269988.

The previous prime is 78743546867. The next prime is 78743546897. The reversal of 78743546873 is 37864534787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78743546873 - 2⁶ = 78743546809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78743546813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587638343 + ... + 587638476.

It is an arithmetic number, because the mean of its divisors is an integer number (19979705940).

Almost surely, 2^78743546873 is an apocalyptic number.

It is an amenable number.

78743546873 is a deficient number, since it is larger than the sum of its proper divisors (1175276887).

78743546873 is a wasteful number, since it uses less digits than its factorization.

78743546873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175276886.

The product of its digits is 94832640, while the sum is 62.

The spelling of 78743546873 in words is "seventy-eight billion, seven hundred forty-three million, five hundred forty-six thousand, eight hundred seventy-three".