261533456353460 has 48 divisors (see below), whose sum is σ = 549853735775232. Its totient is φ = 104492750630400.

The previous prime is 261533456353457. The next prime is 261533456353573. The reversal of 261533456353460 is 64353654335162.

It is a junction number, because it is equal to n+sod(n) for n = 261533456353396 and 261533456353405.

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, 137019209 + ... + 138914831.

It is an arithmetic number, because the mean of its divisors is an integer number (11455286161984).

Almost surely, 2^{261533456353460} is an apocalyptic number.

261533456353460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261533456353460 is an abundant number, since it is smaller than the sum of its proper divisors (288320279421772).

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

261533456353460 is a wasteful number, since it uses less digits than its factorization.

261533456353460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903584 (or 1903582 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 56.

The spelling of 261533456353460 in words is "two hundred sixty-one trillion, five hundred thirty-three billion, four hundred fifty-six million, three hundred fifty-three thousand, four hundred sixty".