123978127475 has 24 divisors (see below), whose sum is σ = 154680328992. Its totient is φ = 98571686400.

The previous prime is 123978127451. The next prime is 123978127477. The reversal of 123978127475 is 574721879321.

It is not a de Polignac number, because 123978127475 - 2⁸ = 123978127219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123978127475.

It is not an unprimeable number, because it can be changed into a prime (123978127477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19126235 + ... + 19132715.

It is an arithmetic number, because the mean of its divisors is an integer number (6445013708).

Almost surely, 2^123978127475 is an apocalyptic number.

123978127475 is a deficient number, since it is larger than the sum of its proper divisors (30702201517).

123978127475 is a wasteful number, since it uses less digits than its factorization.

123978127475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11087 (or 11082 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 56.

The spelling of 123978127475 in words is "one hundred twenty-three billion, nine hundred seventy-eight million, one hundred twenty-seven thousand, four hundred seventy-five".