78460936497 has 20 divisors (see below), whose sum is σ = 117854652916. Its totient is φ = 52018290720.

The previous prime is 78460936471. The next prime is 78460936511. The reversal of 78460936497 is 79463906487.

78460936497 is a `hidden beast` number, since 7 + 84 + 60 + 9 + 3 + 6 + 497 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21531453696 + 56929482801 = 146736^2 + 238599^2 .

It is not a de Polignac number, because 78460936497 - 2⁸ = 78460936241 is a prime.

It is a super-2 number, since 2×78460936497² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78460936427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2661178 + ... + 2690499.

Almost surely, 2^78460936497 is an apocalyptic number.

It is an amenable number.

78460936497 is a deficient number, since it is larger than the sum of its proper divisors (39393716419).

78460936497 is a wasteful number, since it uses less digits than its factorization.

78460936497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5351870 (or 5351861 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 78460936497 in words is "seventy-eight billion, four hundred sixty million, nine hundred thirty-six thousand, four hundred ninety-seven".