25378608033 has 24 divisors (see below), whose sum is σ = 37361998440. Its totient is φ = 16594356480.

The previous prime is 25378608023. The next prime is 25378608061. The reversal of 25378608033 is 33080687352.

25378608033 is a `hidden beast` number, since 2 + 5 + 3 + 7 + 8 + 608 + 0 + 33 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12467285649 + 12911322384 = 111657^2 + 113628^2 .

It is not a de Polignac number, because 25378608033 - 2⁹ = 25378607521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25378608033.

It is not an unprimeable number, because it can be changed into a prime (25378608023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1844383 + ... + 1858091.

It is an arithmetic number, because the mean of its divisors is an integer number (1556749935).

Almost surely, 2^25378608033 is an apocalyptic number.

It is an amenable number.

25378608033 is a deficient number, since it is larger than the sum of its proper divisors (11983390407).

25378608033 is a wasteful number, since it uses less digits than its factorization.

25378608033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17649 (or 17646 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 25378608033 in words is "twenty-five billion, three hundred seventy-eight million, six hundred eight thousand, thirty-three".