260642646456 has 64 divisors (see below), whose sum is σ = 709553520000. Its totient is φ = 79469986176.

The previous prime is 260642646373. The next prime is 260642646469. The reversal of 260642646456 is 654646246062.

It is a junction number, because it is equal to n+sod(n) for n = 260642646399 and 260642646408.

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, 9841686 + ... + 9868133.

It is an arithmetic number, because the mean of its divisors is an integer number (11086773750).

Almost surely, 2^260642646456 is an apocalyptic number.

It is an amenable number.

260642646456 is an abundant number, since it is smaller than the sum of its proper divisors (448910873544).

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

260642646456 is a wasteful number, since it uses less digits than its factorization.

260642646456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19709876 (or 19709872 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 51.

The spelling of 260642646456 in words is "two hundred sixty billion, six hundred forty-two million, six hundred forty-six thousand, four hundred fifty-six".