25447952890 has 8 divisors (see below), whose sum is σ = 45806315220. Its totient is φ = 10179181152.

The previous prime is 25447952861. The next prime is 25447952891. The reversal of 25447952890 is 9825974452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24831771561 + 616181329 = 157581^2 + 24823^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25447952891) 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, 1272397635 + ... + 1272397654.

Almost surely, 2^25447952890 is an apocalyptic number.

25447952890 is a deficient number, since it is larger than the sum of its proper divisors (20358362330).

25447952890 is a wasteful number, since it uses less digits than its factorization.

25447952890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544795296.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 25447952890 in words is "twenty-five billion, four hundred forty-seven million, nine hundred fifty-two thousand, eight hundred ninety".