78468139573 has 16 divisors (see below), whose sum is σ = 81837166320. Its totient is φ = 75173184000.

The previous prime is 78468139483. The next prime is 78468139597. The reversal of 78468139573 is 37593186487.

It can be written as a sum of positive squares in 8 ways, for example, as 413837649 + 78054301924 = 20343^2 + 279382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78468139573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78468139073) 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, 618393 + ... + 734401.

It is an arithmetic number, because the mean of its divisors is an integer number (5114822895).

Almost surely, 2^78468139573 is an apocalyptic number.

It is an amenable number.

78468139573 is a deficient number, since it is larger than the sum of its proper divisors (3369026747).

78468139573 is a wasteful number, since it uses less digits than its factorization.

78468139573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116328.

The product of its digits is 30481920, while the sum is 61.

The spelling of 78468139573 in words is "seventy-eight billion, four hundred sixty-eight million, one hundred thirty-nine thousand, five hundred seventy-three".