261675223621751 has 8 divisors (see below), whose sum is σ = 265965524018784. Its totient is φ = 257384940729120.

The previous prime is 261675223621703. The next prime is 261675223621759. The reversal of 261675223621751 is 157126322576162.

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-261675223621751 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 (261675223621759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27676070 + ... + 35907036.

It is an arithmetic number, because the mean of its divisors is an integer number (33245690502348).

Almost surely, 2^{261675223621751} is an apocalyptic number.

261675223621751 is a deficient number, since it is larger than the sum of its proper divisors (4290300397033).

261675223621751 is an equidigital number, since it uses as much as digits as its factorization.

261675223621751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8752201.

The product of its digits is 12700800, while the sum is 56.

The spelling of 261675223621751 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, two hundred twenty-three million, six hundred twenty-one thousand, seven hundred fifty-one".