261533466031001 has 4 divisors (see below), whose sum is σ = 262033530020112. Its totient is φ = 261033402041892.

The previous prime is 261533466030929. The next prime is 261533466031081. The reversal of 261533466031001 is 100130664335162.

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 261533466031001 - 2⁴² = 257135419519897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261533466031001.

It is not an unprimeable number, because it can be changed into a prime (261533466031081) 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, 250031993771 + ... + 250031994816.

It is an arithmetic number, because the mean of its divisors is an integer number (65508382505028).

Almost surely, 2^{261533466031001} is an apocalyptic number.

It is an amenable number.

261533466031001 is a deficient number, since it is larger than the sum of its proper divisors (500063989111).

261533466031001 is an equidigital number, since it uses as much as digits as its factorization.

261533466031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500063989110.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 261533466031001 in words is "two hundred sixty-one trillion, five hundred thirty-three billion, four hundred sixty-six million, thirty-one thousand, one".