261535126577464 has 16 divisors (see below), whose sum is σ = 490906218495600. Its totient is φ = 130626801645312.

The previous prime is 261535126577407. The next prime is 261535126577477. The reversal of 261535126577464 is 464775621535162.

261535126577464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261535126577396 and 261535126577405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17595197532 + ... + 17595212395.

It is an arithmetic number, because the mean of its divisors is an integer number (30681638655975).

Almost surely, 2^{261535126577464} is an apocalyptic number.

It is an amenable number.

261535126577464 is a deficient number, since it is larger than the sum of its proper divisors (229371091918136).

261535126577464 is a wasteful number, since it uses less digits than its factorization.

261535126577464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35190410862 (or 35190410858 counting only the distinct ones).

The product of its digits is 254016000, while the sum is 64.

The spelling of 261535126577464 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, one hundred twenty-six million, five hundred seventy-seven thousand, four hundred sixty-four".