25001132343643 has 4 divisors (see below), whose sum is σ = 25001153158360. Its totient is φ = 25001111528928.

The previous prime is 25001132343641. The next prime is 25001132343647. The reversal of 25001132343643 is 34634323110052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25001132343643 - 2¹ = 25001132343641 is a prime.

It is a super-2 number, since 2×25001132343643² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25001132343641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8487630 + ... + 11047267.

It is an arithmetic number, because the mean of its divisors is an integer number (6250288289590).

Almost surely, 2^{25001132343643} is an apocalyptic number.

25001132343643 is a deficient number, since it is larger than the sum of its proper divisors (20814717).

25001132343643 is a wasteful number, since it uses less digits than its factorization.

25001132343643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20814716.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 25001132343643 its reverse (34634323110052), we get a palindrome (59635455453695).

The spelling of 25001132343643 in words is "twenty-five trillion, one billion, one hundred thirty-two million, three hundred forty-three thousand, six hundred forty-three".