25122387638 has 8 divisors (see below), whose sum is σ = 37686467160. Its totient is φ = 12560231920.

The previous prime is 25122387637. The next prime is 25122387677. The reversal of 25122387638 is 83678322152.

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

It is a super-3 number, since 3×25122387638³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 25122387592 and 25122387601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25122387637) 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, 447848 + ... + 500811.

It is an arithmetic number, because the mean of its divisors is an integer number (4710808395).

Almost surely, 2^25122387638 is an apocalyptic number.

25122387638 is a deficient number, since it is larger than the sum of its proper divisors (12564079522).

25122387638 is a wasteful number, since it uses less digits than its factorization.

25122387638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961902.

The product of its digits is 967680, while the sum is 47.

The spelling of 25122387638 in words is "twenty-five billion, one hundred twenty-two million, three hundred eighty-seven thousand, six hundred thirty-eight".