25454545124 has 24 divisors (see below), whose sum is σ = 45652109496. Its totient is φ = 12411360000.

The previous prime is 25454545121. The next prime is 25454545139. The reversal of 25454545124 is 42154545452.

It can be written as a sum of positive squares in 4 ways, for example, as 33431524 + 25421113600 = 5782^2 + 159440^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (25454545121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350774 + ... + 417074.

It is an arithmetic number, because the mean of its divisors is an integer number (1902171229).

Almost surely, 2^25454545124 is an apocalyptic number.

It is an amenable number.

25454545124 is a deficient number, since it is larger than the sum of its proper divisors (20197564372).

25454545124 is a wasteful number, since it uses less digits than its factorization.

25454545124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68687 (or 68685 counting only the distinct ones).

The product of its digits is 640000, while the sum is 41.

The spelling of 25454545124 in words is "twenty-five billion, four hundred fifty-four million, five hundred forty-five thousand, one hundred twenty-four".