261304416001 has 4 divisors (see below), whose sum is σ = 261311634432. Its totient is φ = 261297197572.

The previous prime is 261304415951. The next prime is 261304416047. The reversal of 261304416001 is 100614403162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261304416001 - 2³⁵ = 226944677633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261304416071) 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, 3554641 + ... + 3627406.

It is an arithmetic number, because the mean of its divisors is an integer number (65327908608).

Almost surely, 2^261304416001 is an apocalyptic number.

It is an amenable number.

261304416001 is a deficient number, since it is larger than the sum of its proper divisors (7218431).

261304416001 is an equidigital number, since it uses as much as digits as its factorization.

261304416001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7218430.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 261304416001 its reverse (100614403162), we get a palindrome (361918819163).

The spelling of 261304416001 in words is "two hundred sixty-one billion, three hundred four million, four hundred sixteen thousand, one".