78623938539 has 24 divisors (see below), whose sum is σ = 114275942352. Its totient is φ = 52089791040.

The previous prime is 78623938483. The next prime is 78623938559. The reversal of 78623938539 is 93583932687.

78623938539 is a `hidden beast` number, since 7 + 8 + 6 + 2 + 3 + 93 + 8 + 539 = 666.

It is not a de Polignac number, because 78623938539 - 2¹³ = 78623930347 is a prime.

It is a super-2 number, since 2×78623938539² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78623938559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1540449 + ... + 1590669.

It is an arithmetic number, because the mean of its divisors is an integer number (4761497598).

Almost surely, 2^78623938539 is an apocalyptic number.

78623938539 is a deficient number, since it is larger than the sum of its proper divisors (35652003813).

78623938539 is a wasteful number, since it uses less digits than its factorization.

78623938539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51307 (or 51304 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 78623938539 in words is "seventy-eight billion, six hundred twenty-three million, nine hundred thirty-eight thousand, five hundred thirty-nine".