25778450357 has 4 divisors (see below), whose sum is σ = 28121945856. Its totient is φ = 23434954860.

The previous prime is 25778450353. The next prime is 25778450363. The reversal of 25778450357 is 75305487752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25778450357 - 2² = 25778450353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25778450299 and 25778450308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778450353) 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, 1171747733 + ... + 1171747754.

It is an arithmetic number, because the mean of its divisors is an integer number (7030486464).

Almost surely, 2^25778450357 is an apocalyptic number.

It is an amenable number.

25778450357 is a deficient number, since it is larger than the sum of its proper divisors (2343495499).

25778450357 is a wasteful number, since it uses less digits than its factorization.

25778450357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343495498.

The product of its (nonzero) digits is 8232000, while the sum is 53.

The spelling of 25778450357 in words is "twenty-five billion, seven hundred seventy-eight million, four hundred fifty thousand, three hundred fifty-seven".