78684541037 has 4 divisors (see below), whose sum is σ = 80358680256. Its totient is φ = 77010401820.

The previous prime is 78684541009. The next prime is 78684541057. The reversal of 78684541037 is 73014548687.

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 78684541037 - 2¹⁰ = 78684540013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78684541037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78684541057) 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 3 ways as a sum of consecutive naturals, for example, 837069539 + ... + 837069632.

It is an arithmetic number, because the mean of its divisors is an integer number (20089670064).

Almost surely, 2^78684541037 is an apocalyptic number.

It is an amenable number.

78684541037 is a deficient number, since it is larger than the sum of its proper divisors (1674139219).

78684541037 is a wasteful number, since it uses less digits than its factorization.

78684541037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674139218.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 78684541037 in words is "seventy-eight billion, six hundred eighty-four million, five hundred forty-one thousand, thirty-seven".