25150638642 has 8 divisors (see below), whose sum is σ = 50301277296. Its totient is φ = 8383546212.

The previous prime is 25150638607. The next prime is 25150638647. The reversal of 25150638642 is 24683605152.

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

25150638642 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 25150638594 and 25150638603.

It is not an unprimeable number, because it can be changed into a prime (25150638647) 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, 2095886548 + ... + 2095886559.

It is an arithmetic number, because the mean of its divisors is an integer number (6287659662).

Almost surely, 2^25150638642 is an apocalyptic number.

25150638642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25150638642 is a wasteful number, since it uses less digits than its factorization.

25150638642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191773112.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 25150638642 in words is "twenty-five billion, one hundred fifty million, six hundred thirty-eight thousand, six hundred forty-two".