25323139738 has 8 divisors (see below), whose sum is σ = 40906610388. Its totient is φ = 11687602944.

The previous prime is 25323139733. The next prime is 25323139739. The reversal of 25323139738 is 83793132352.

It can be written as a sum of positive squares in 2 ways, for example, as 24914412649 + 408727089 = 157843^2 + 20217^2 .

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

It is a super-2 number, since 2×25323139738² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25323139733) 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 3 ways as a sum of consecutive naturals, for example, 486983431 + ... + 486983482.

Almost surely, 2^25323139738 is an apocalyptic number.

25323139738 is a deficient number, since it is larger than the sum of its proper divisors (15583470650).

25323139738 is a wasteful number, since it uses less digits than its factorization.

25323139738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973966928.

The product of its digits is 816480, while the sum is 46.

The spelling of 25323139738 in words is "twenty-five billion, three hundred twenty-three million, one hundred thirty-nine thousand, seven hundred thirty-eight".