261441435573507 has 32 divisors (see below), whose sum is σ = 399094113438720. Its totient is φ = 149129928783360.

The previous prime is 261441435573491. The next prime is 261441435573511. The reversal of 261441435573507 is 705375534144162.

It is not a de Polignac number, because 261441435573507 - 2⁴ = 261441435573491 is a prime.

It is a super-2 number, since 2×261441435573507² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261441435573007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 830071018 + ... + 830385920.

It is an arithmetic number, because the mean of its divisors is an integer number (12471691044960).

Almost surely, 2^{261441435573507} is an apocalyptic number.

261441435573507 is a deficient number, since it is larger than the sum of its proper divisors (137652677865213).

261441435573507 is a wasteful number, since it uses less digits than its factorization.

261441435573507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384963.

The product of its (nonzero) digits is 42336000, while the sum is 57.

The spelling of 261441435573507 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 seven".