25045020643 has 8 divisors (see below), whose sum is σ = 26217974016. Its totient is φ = 23879070600.

The previous prime is 25045020641. The next prime is 25045020659. The reversal of 25045020643 is 34602054052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25045020643 - 2¹ = 25045020641 is a prime.

It is a super-2 number, since 2×25045020643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25045020641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1743513 + ... + 1757818.

It is an arithmetic number, because the mean of its divisors is an integer number (3277246752).

Almost surely, 2^25045020643 is an apocalyptic number.

25045020643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25045020643 is a deficient number, since it is larger than the sum of its proper divisors (1172953373).

25045020643 is a wasteful number, since it uses less digits than its factorization.

25045020643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501665.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 25045020643 its reverse (34602054052), we get a palindrome (59647074695).

The spelling of 25045020643 in words is "twenty-five billion, forty-five million, twenty thousand, six hundred forty-three".