25403042015 has 8 divisors (see below), whose sum is σ = 32828546688. Its totient is φ = 18759169440.

The previous prime is 25403041999. The next prime is 25403042051. The reversal of 25403042015 is 51024030452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25403042015 - 2⁴ = 25403041999 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 7 ways as a sum of consecutive naturals, for example, 195407951 + ... + 195408080.

It is an arithmetic number, because the mean of its divisors is an integer number (4103568336).

Almost surely, 2^25403042015 is an apocalyptic number.

25403042015 is a deficient number, since it is larger than the sum of its proper divisors (7425504673).

25403042015 is a wasteful number, since it uses less digits than its factorization.

25403042015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390816049.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 25403042015 its reverse (51024030452), we get a palindrome (76427072467).

The spelling of 25403042015 in words is "twenty-five billion, four hundred three million, forty-two thousand, fifteen".