1305640456530 has 64 divisors (see below), whose sum is σ = 3171804991488. Its totient is φ = 343920162240.

The previous prime is 1305640456493. The next prime is 1305640456537. The reversal of 1305640456530 is 356540465031.

It is not an unprimeable number, because it can be changed into a prime (1305640456537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16621407 + ... + 16699773.

It is an arithmetic number, because the mean of its divisors is an integer number (49559452992).

Almost surely, 2^{1305640456530} is an apocalyptic number.

1305640456530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305640456530 is an abundant number, since it is smaller than the sum of its proper divisors (1866164534958).

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

1305640456530 is a wasteful number, since it uses less digits than its factorization.

1305640456530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85151.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 1305640456530 in words is "one trillion, three hundred five billion, six hundred forty million, four hundred fifty-six thousand, five hundred thirty".