25441501661 has 8 divisors (see below), whose sum is σ = 26132404224. Its totient is φ = 24750772560.

The previous prime is 25441501627. The next prime is 25441501663. The reversal of 25441501661 is 16610514452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25441501661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25441501663) 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, 287816 + ... + 365678.

It is an arithmetic number, because the mean of its divisors is an integer number (3266550528).

Almost surely, 2^25441501661 is an apocalyptic number.

It is an amenable number.

25441501661 is a deficient number, since it is larger than the sum of its proper divisors (690902563).

25441501661 is an equidigital number, since it uses as much as digits as its factorization.

25441501661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86731.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 25441501661 in words is "twenty-five billion, four hundred forty-one million, five hundred one thousand, six hundred sixty-one".