78897080013 has 4 divisors (see below), whose sum is σ = 105196106688. Its totient is φ = 52598053340.

The previous prime is 78897080011. The next prime is 78897080029. The reversal of 78897080013 is 31008079887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31008079887 = 3 ⋅10336026629.

It is a cyclic number.

It is not a de Polignac number, because 78897080013 - 2¹ = 78897080011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78897080011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13149513333 + ... + 13149513338.

It is an arithmetic number, because the mean of its divisors is an integer number (26299026672).

Almost surely, 2^78897080013 is an apocalyptic number.

It is an amenable number.

78897080013 is a deficient number, since it is larger than the sum of its proper divisors (26299026675).

78897080013 is a wasteful number, since it uses less digits than its factorization.

78897080013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26299026674.

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 78897080013 in words is "seventy-eight billion, eight hundred ninety-seven million, eighty thousand, thirteen".