25126938658 has 8 divisors (see below), whose sum is σ = 37755731052. Its totient is φ = 12541694976.

The previous prime is 25126938649. The next prime is 25126938659. The reversal of 25126938658 is 85683962152.

It can be written as a sum of positive squares in 2 ways, for example, as 23235819489 + 1891119169 = 152433^2 + 43487^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25126938599 and 25126938608.

It is not an unprimeable number, because it can be changed into a prime (25126938659) 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, 10885735 + ... + 10888042.

Almost surely, 2^25126938658 is an apocalyptic number.

25126938658 is a deficient number, since it is larger than the sum of its proper divisors (12628792394).

25126938658 is a wasteful number, since it uses less digits than its factorization.

25126938658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21774356.

The product of its digits is 6220800, while the sum is 55.

The spelling of 25126938658 in words is "twenty-five billion, one hundred twenty-six million, nine hundred thirty-eight thousand, six hundred fifty-eight".