25340640358 has 16 divisors (see below), whose sum is σ = 41619525120. Its totient is φ = 11475966600.

The previous prime is 25340640293. The next prime is 25340640389. The reversal of 25340640358 is 85304604352.

It is a self number, because there is not a number n which added to its sum of digits gives 25340640358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119218 + ... + 2131141.

It is an arithmetic number, because the mean of its divisors is an integer number (2601220320).

Almost surely, 2^25340640358 is an apocalyptic number.

25340640358 is a deficient number, since it is larger than the sum of its proper divisors (16278884762).

25340640358 is a wasteful number, since it uses less digits than its factorization.

25340640358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250643.

The product of its (nonzero) digits is 345600, while the sum is 40.

It can be divided in two parts, 253406 and 40358, that added together give a square (293764 = 542²).

The spelling of 25340640358 in words is "twenty-five billion, three hundred forty million, six hundred forty thousand, three hundred fifty-eight".