261114401859 has 4 divisors (see below), whose sum is σ = 348152535816. Its totient is φ = 174076267904.

The previous prime is 261114401813. The next prime is 261114401887. The reversal of 261114401859 is 958104411162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261114401859 - 2¹¹ = 261114399811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261114401859.

It is not an unprimeable number, because it can be changed into a prime (261114401459) 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, 43519066974 + ... + 43519066979.

It is an arithmetic number, because the mean of its divisors is an integer number (87038133954).

Almost surely, 2^261114401859 is an apocalyptic number.

261114401859 is a deficient number, since it is larger than the sum of its proper divisors (87038133957).

261114401859 is an equidigital number, since it uses as much as digits as its factorization.

261114401859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87038133956.

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 261114401859 in words is "two hundred sixty-one billion, one hundred fourteen million, four hundred one thousand, eight hundred fifty-nine".