261406405119 has 8 divisors (see below), whose sum is σ = 355118135472. Its totient is φ = 170982805760.

The previous prime is 261406405109. The next prime is 261406405153. The reversal of 261406405119 is 911504604162.

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

It is a cyclic number.

It is not a de Polignac number, because 261406405119 - 2⁵ = 261406405087 is a prime.

It is a super-2 number, since 2×261406405119² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261406405109) 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, 822032562 + ... + 822032879.

It is an arithmetic number, because the mean of its divisors is an integer number (44389766934).

Almost surely, 2^261406405119 is an apocalyptic number.

261406405119 is a deficient number, since it is larger than the sum of its proper divisors (93711730353).

261406405119 is a wasteful number, since it uses less digits than its factorization.

261406405119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644065497.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 261406405119 in words is "two hundred sixty-one billion, four hundred six million, four hundred five thousand, one hundred nineteen".