78738816237 has 16 divisors (see below), whose sum is σ = 110531520000. Its totient is φ = 49720373424.

The previous prime is 78738816229. The next prime is 78738816251. The reversal of 78738816237 is 73261883787.

It is not a de Polignac number, because 78738816237 - 2³ = 78738816229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78738816257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179814 + ... + 435672.

It is an arithmetic number, because the mean of its divisors is an integer number (6908220000).

Almost surely, 2^78738816237 is an apocalyptic number.

It is an amenable number.

78738816237 is a deficient number, since it is larger than the sum of its proper divisors (31792703763).

78738816237 is a wasteful number, since it uses less digits than its factorization.

78738816237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261280.

The product of its digits is 18966528, while the sum is 60.

The spelling of 78738816237 in words is "seventy-eight billion, seven hundred thirty-eight million, eight hundred sixteen thousand, two hundred thirty-seven".