260899885440 has 896 divisors, whose sum is σ = 1001286982080. Its totient is φ = 64815759360.

The previous prime is 260899885429. The next prime is 260899885457. The reversal of 260899885440 is 44588998062.

260899885440 is a `hidden beast` number, since 2 + 6 + 0 + 8 + 9 + 9 + 88 + 544 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 439965784 + ... + 439966376.

Almost surely, 2^260899885440 is an apocalyptic number.

260899885440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260899885440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500643491040).

260899885440 is an abundant number, since it is smaller than the sum of its proper divisors (740387096640).

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

260899885440 is an equidigital number, since it uses as much as digits as its factorization.

260899885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 260899885440 in words is "two hundred sixty billion, eight hundred ninety-nine million, eight hundred eighty-five thousand, four hundred forty".