260981019861 has 8 divisors (see below), whose sum is σ = 347979386304. Its totient is φ = 173985000000.

The previous prime is 260981019857. The next prime is 260981019899. The reversal of 260981019861 is 168910189062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 260981019861 - 2² = 260981019857 is a prime.

It is a super-2 number, since 2×260981019861² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260981019841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308265 + ... + 785486.

It is an arithmetic number, because the mean of its divisors is an integer number (43497423288).

Almost surely, 2^260981019861 is an apocalyptic number.

It is an amenable number.

260981019861 is a deficient number, since it is larger than the sum of its proper divisors (86998366443).

260981019861 is a wasteful number, since it uses less digits than its factorization.

260981019861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173291.

The product of its (nonzero) digits is 373248, while the sum is 51.

The spelling of 260981019861 in words is "two hundred sixty billion, nine hundred eighty-one million, nineteen thousand, eight hundred sixty-one".