25041001643 has 8 divisors (see below), whose sum is σ = 29227187712. Its totient is φ = 21007040616.

The previous prime is 25041001633. The next prime is 25041001681. The reversal of 25041001643 is 34610014052.

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 25041001643 - 2⁴ = 25041001627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25041001633) 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, 38055905 + ... + 38056562.

It is an arithmetic number, because the mean of its divisors is an integer number (3653398464).

Almost surely, 2^25041001643 is an apocalyptic number.

25041001643 is a deficient number, since it is larger than the sum of its proper divisors (4186186069).

25041001643 is an equidigital number, since it uses as much as digits as its factorization.

25041001643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76112521.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 25041001643 its reverse (34610014052), we get a palindrome (59651015695).

The spelling of 25041001643 in words is "twenty-five billion, forty-one million, one thousand, six hundred forty-three".