78723948737 has 32 divisors (see below), whose sum is σ = 95992999680. Its totient is φ = 63061804800.

The previous prime is 78723948733. The next prime is 78723948739. The reversal of 78723948737 is 73784932787.

It is a cyclic number.

It is not a de Polignac number, because 78723948737 - 2² = 78723948733 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78723948733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3710363 + ... + 3731519.

It is an arithmetic number, because the mean of its divisors is an integer number (2999781240).

Almost surely, 2^78723948737 is an apocalyptic number.

It is an amenable number.

78723948737 is a deficient number, since it is larger than the sum of its proper divisors (17269050943).

78723948737 is a wasteful number, since it uses less digits than its factorization.

78723948737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21561.

The product of its digits is 99574272, while the sum is 65.

The spelling of 78723948737 in words is "seventy-eight billion, seven hundred twenty-three million, nine hundred forty-eight thousand, seven hundred thirty-seven".