261057186446 has 64 divisors (see below), whose sum is σ = 456569136000. Its totient is φ = 109646659584.

The previous prime is 261057186407. The next prime is 261057186457. The reversal of 261057186446 is 644681750162.

It is a super-2 number, since 2×261057186446² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261057186394 and 261057186403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107121140 + ... + 107123576.

It is an arithmetic number, because the mean of its divisors is an integer number (7133892750).

Almost surely, 2^261057186446 is an apocalyptic number.

261057186446 is a deficient number, since it is larger than the sum of its proper divisors (195511949554).

261057186446 is a wasteful number, since it uses less digits than its factorization.

261057186446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 261057186446 in words is "two hundred sixty-one billion, fifty-seven million, one hundred eighty-six thousand, four hundred forty-six".