123253647678 has 64 divisors (see below), whose sum is σ = 323819136000. Its totient is φ = 34001003232.

The previous prime is 123253647631. The next prime is 123253647733. The reversal of 123253647678 is 876746352321.

It is a happy number.

123253647678 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 536 + 47 + 67 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5610898 + ... + 5632821.

It is an arithmetic number, because the mean of its divisors is an integer number (5059674000).

Almost surely, 2^123253647678 is an apocalyptic number.

123253647678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123253647678 is an abundant number, since it is smaller than the sum of its proper divisors (200565488322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123253647678 is a wasteful number, since it uses less digits than its factorization.

123253647678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11243766 (or 11243760 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

Adding to 123253647678 its reverse (876746352321), we get a palindrome (999999999999).

The spelling of 123253647678 in words is "one hundred twenty-three billion, two hundred fifty-three million, six hundred forty-seven thousand, six hundred seventy-eight".