78761653723 has 4 divisors (see below), whose sum is σ = 79233280560. Its totient is φ = 78290026888.

The previous prime is 78761653703. The next prime is 78761653727. The reversal of 78761653723 is 32735616787.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78761653723 - 2³³ = 70171719131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78761653727) 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, 235813168 + ... + 235813501.

It is an arithmetic number, because the mean of its divisors is an integer number (19808320140).

Almost surely, 2^78761653723 is an apocalyptic number.

78761653723 is a deficient number, since it is larger than the sum of its proper divisors (471626837).

78761653723 is a wasteful number, since it uses less digits than its factorization.

78761653723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471626836.

The product of its digits is 8890560, while the sum is 55.

The spelling of 78761653723 in words is "seventy-eight billion, seven hundred sixty-one million, six hundred fifty-three thousand, seven hundred twenty-three".