261770750461771 has 16 divisors (see below), whose sum is σ = 262237886171136. Its totient is φ = 261304135056576.

The previous prime is 261770750461769. The next prime is 261770750461789. The reversal of 261770750461771 is 177164057077162.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 261770750461771 - 2¹ = 261770750461769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261770750461751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6173380456 + ... + 6173422858.

It is an arithmetic number, because the mean of its divisors is an integer number (16389867885696).

Almost surely, 2^{261770750461771} is an apocalyptic number.

261770750461771 is a deficient number, since it is larger than the sum of its proper divisors (467135709365).

261770750461771 is a wasteful number, since it uses less digits than its factorization.

261770750461771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48282.

The product of its (nonzero) digits is 24202080, while the sum is 61.

The spelling of 261770750461771 in words is "two hundred sixty-one trillion, seven hundred seventy billion, seven hundred fifty million, four hundred sixty-one thousand, seven hundred seventy-one".