78540457073 has 24 divisors (see below), whose sum is σ = 89317787328. Its totient is φ = 68644866528.

The previous prime is 78540457069. The next prime is 78540457087. The reversal of 78540457073 is 37075404587.

It is a happy number.

It is not a de Polignac number, because 78540457073 - 2² = 78540457069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78540457573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11367686 + ... + 11374592.

It is an arithmetic number, because the mean of its divisors is an integer number (3721574472).

Almost surely, 2^78540457073 is an apocalyptic number.

It is an amenable number.

78540457073 is a deficient number, since it is larger than the sum of its proper divisors (10777330255).

78540457073 is a wasteful number, since it uses less digits than its factorization.

78540457073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9381 (or 9362 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 50.

The spelling of 78540457073 in words is "seventy-eight billion, five hundred forty million, four hundred fifty-seven thousand, seventy-three".