13423657678 has 4 divisors (see below), whose sum is σ = 20135486520. Its totient is φ = 6711828838.

The previous prime is 13423657673. The next prime is 13423657697. The reversal of 13423657678 is 87675632431.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×13423657678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423657673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3355914418 + ... + 3355914421.

It is an arithmetic number, because the mean of its divisors is an integer number (5033871630).

Almost surely, 2^13423657678 is an apocalyptic number.

13423657678 is a deficient number, since it is larger than the sum of its proper divisors (6711828842).

13423657678 is an equidigital number, since it uses as much as digits as its factorization.

13423657678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711828841.

The product of its digits is 5080320, while the sum is 52.

The spelling of 13423657678 in words is "thirteen billion, four hundred twenty-three million, six hundred fifty-seven thousand, six hundred seventy-eight".