1305640540260 has 144 divisors (see below), whose sum is σ = 4548966240000. Its totient is φ = 296932407552.

The previous prime is 1305640540229. The next prime is 1305640540289. The reversal of 1305640540260 is 620450465031.

1305640540260 is a `hidden beast` number, since 1 + 3 + 0 + 5 + 640 + 5 + 4 + 0 + 2 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2352835 + ... + 2854314.

Almost surely, 2^{1305640540260} is an apocalyptic number.

1305640540260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305640540260 is an abundant number, since it is smaller than the sum of its proper divisors (3243325699740).

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

1305640540260 is a wasteful number, since it uses less digits than its factorization.

1305640540260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207370 (or 5207365 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 1305640540260 in words is "one trillion, three hundred five billion, six hundred forty million, five hundred forty thousand, two hundred sixty".