1361561543466 has 32 divisors (see below), whose sum is σ = 2910253613760. Its totient is φ = 423164441856.

The previous prime is 1361561543399. The next prime is 1361561543467. The reversal of 1361561543466 is 6643451651631.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1361561543467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62365921 + ... + 62387748.

It is an arithmetic number, because the mean of its divisors is an integer number (90945425430).

Almost surely, 2^{1361561543466} is an apocalyptic number.

1361561543466 is an abundant number, since it is smaller than the sum of its proper divisors (1548692070294).

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

1361561543466 is a wasteful number, since it uses less digits than its factorization.

1361561543466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124753798.

The product of its digits is 4665600, while the sum is 51.

The spelling of 1361561543466 in words is "one trillion, three hundred sixty-one billion, five hundred sixty-one million, five hundred forty-three thousand, four hundred sixty-six".