25380340806 has 32 divisors (see below), whose sum is σ = 51312064608. Its totient is φ = 8368312320.

The previous prime is 25380340793. The next prime is 25380340831. The reversal of 25380340806 is 60804308352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1148986 + ... + 1170866.

It is an arithmetic number, because the mean of its divisors is an integer number (1603502019).

Almost surely, 2^25380340806 is an apocalyptic number.

25380340806 is an abundant number, since it is smaller than the sum of its proper divisors (25931723802).

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

25380340806 is a wasteful number, since it uses less digits than its factorization.

25380340806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23976.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 25380340806 in words is "twenty-five billion, three hundred eighty million, three hundred forty thousand, eight hundred six".