25138202802 has 16 divisors (see below), whose sum is σ = 50448000960. Its totient is φ = 8350801712.

The previous prime is 25138202801. The next prime is 25138202827. The reversal of 25138202802 is 20820283152.

It is a super-2 number, since 2×25138202802² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25138202801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7147902 + ... + 7151417.

It is an arithmetic number, because the mean of its divisors is an integer number (3153000060).

Almost surely, 2^25138202802 is an apocalyptic number.

25138202802 is an abundant number, since it is smaller than the sum of its proper divisors (25309798158).

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

25138202802 is a wasteful number, since it uses less digits than its factorization.

25138202802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14299617.

The product of its (nonzero) digits is 15360, while the sum is 33.

Adding to 25138202802 its reverse (20820283152), we get a palindrome (45958485954).

The spelling of 25138202802 in words is "twenty-five billion, one hundred thirty-eight million, two hundred two thousand, eight hundred two".