25361533642 has 8 divisors (see below), whose sum is σ = 38043526500. Its totient is φ = 12680358144.

The previous prime is 25361533537. The next prime is 25361533643. The reversal of 25361533642 is 24633516352.

It can be written as a sum of positive squares in 2 ways, for example, as 21888906601 + 3472627041 = 147949^2 + 58929^2 .

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 = 25361533595 and 25361533604.

It is not an unprimeable number, because it can be changed into a prime (25361533643) 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 3 ways as a sum of consecutive naturals, for example, 119767 + ... + 255082.

Almost surely, 2^25361533642 is an apocalyptic number.

25361533642 is a deficient number, since it is larger than the sum of its proper divisors (12681992858).

25361533642 is a wasteful number, since it uses less digits than its factorization.

25361533642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408680.

The product of its digits is 388800, while the sum is 40.

The spelling of 25361533642 in words is "twenty-five billion, three hundred sixty-one million, five hundred thirty-three thousand, six hundred forty-two".