123673778525 has 24 divisors (see below), whose sum is σ = 167321680608. Its totient is φ = 89931240000.

The previous prime is 123673778519. The next prime is 123673778539. The reversal of 123673778525 is 525877376321.

It is not a de Polignac number, because 123673778525 - 2⁸ = 123673778269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2066270 + ... + 2125280.

It is an arithmetic number, because the mean of its divisors is an integer number (6971736692).

Almost surely, 2^123673778525 is an apocalyptic number.

It is an amenable number.

123673778525 is a deficient number, since it is larger than the sum of its proper divisors (43647902083).

123673778525 is a wasteful number, since it uses less digits than its factorization.

123673778525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66653 (or 66648 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 56.

The spelling of 123673778525 in words is "one hundred twenty-three billion, six hundred seventy-three million, seven hundred seventy-eight thousand, five hundred twenty-five".