1305691406540 has 12 divisors (see below), whose sum is σ = 2741951953776. Its totient is φ = 522276562608.

The previous prime is 1305691406497. The next prime is 1305691406549. The reversal of 1305691406540 is 456041965031.

It is a super-2 number, since 2×1305691406540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1305691406491 and 1305691406500.

It is not an unprimeable number, because it can be changed into a prime (1305691406549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32642285144 + ... + 32642285183.

It is an arithmetic number, because the mean of its divisors is an integer number (228495996148).

Almost surely, 2^{1305691406540} is an apocalyptic number.

1305691406540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305691406540 is an abundant number, since it is smaller than the sum of its proper divisors (1436260547236).

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

1305691406540 is a wasteful number, since it uses less digits than its factorization.

1305691406540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65284570336 (or 65284570334 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 1305691406540 in words is "one trillion, three hundred five billion, six hundred ninety-one million, four hundred six thousand, five hundred forty".