261441435573560 has 64 divisors (see below), whose sum is σ = 641723526108000. Its totient is φ = 95069073856000.

The previous prime is 261441435573511. The next prime is 261441435573611. The reversal of 261441435573560 is 65375534144162.

It is a junction number, because it is equal to n+sod(n) for n = 261441435573496 and 261441435573505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80557166 + ... + 83739714.

Almost surely, 2^{261441435573560} is an apocalyptic number.

261441435573560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261441435573560 is an abundant number, since it is smaller than the sum of its proper divisors (380282090534440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261441435573560 is a wasteful number, since it uses less digits than its factorization.

261441435573560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369272 (or 3369268 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 56.

The spelling of 261441435573560 in words is "two hundred sixty-one trillion, four hundred forty-one billion, four hundred thirty-five million, five hundred seventy-three thousand, five hundred sixty".