25015040123 has 4 divisors (see below), whose sum is σ = 25110154608. Its totient is φ = 24919925640.

The previous prime is 25015040119. The next prime is 25015040147. The reversal of 25015040123 is 32104051052.

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

It is a cyclic number.

It is not a de Polignac number, because 25015040123 - 2² = 25015040119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25015040173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47556848 + ... + 47557373.

It is an arithmetic number, because the mean of its divisors is an integer number (6277538652).

Almost surely, 2^25015040123 is an apocalyptic number.

25015040123 is a deficient number, since it is larger than the sum of its proper divisors (95114485).

25015040123 is an equidigital number, since it uses as much as digits as its factorization.

25015040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95114484.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 25015040123 its reverse (32104051052), we get a palindrome (57119091175).

The spelling of 25015040123 in words is "twenty-five billion, fifteen million, forty thousand, one hundred twenty-three".