261082441407 has 16 divisors (see below), whose sum is σ = 370516764672. Its totient is φ = 162958750080.

The previous prime is 261082441381. The next prime is 261082441423. The reversal of 261082441407 is 704144280162.

It is not a de Polignac number, because 261082441407 - 2²² = 261078247103 is a prime.

It is a super-2 number, since 2×261082441407² (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 (261082441427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13391473 + ... + 13410954.

It is an arithmetic number, because the mean of its divisors is an integer number (23157297792).

Almost surely, 2^261082441407 is an apocalyptic number.

261082441407 is a deficient number, since it is larger than the sum of its proper divisors (109434323265).

261082441407 is a wasteful number, since it uses less digits than its factorization.

261082441407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26802638.

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 261082441407 in words is "two hundred sixty-one billion, eighty-two million, four hundred forty-one thousand, four hundred seven".