25187242391449 has 8 divisors (see below), whose sum is σ = 25302144666240. Its totient is φ = 25072398258336.

The previous prime is 25187242391407. The next prime is 25187242391579. The reversal of 25187242391449 is 94419324278152.

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

It is a cyclic number.

It is not a de Polignac number, because 25187242391449 - 2⁴¹ = 22988219135897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25187242398449) 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, 13666917 + ... + 15399970.

It is an arithmetic number, because the mean of its divisors is an integer number (3162768083280).

Almost surely, 2^{25187242391449} is an apocalyptic number.

It is an amenable number.

25187242391449 is a deficient number, since it is larger than the sum of its proper divisors (114902274791).

25187242391449 is a wasteful number, since it uses less digits than its factorization.

25187242391449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29070839.

The product of its digits is 34836480, while the sum is 61.

The spelling of 25187242391449 in words is "twenty-five trillion, one hundred eighty-seven billion, two hundred forty-two million, three hundred ninety-one thousand, four hundred forty-nine".