1205543473240 has 64 divisors (see below), whose sum is σ = 2719256774400. Its totient is φ = 481012826112.

The previous prime is 1205543473229. The next prime is 1205543473249. The reversal of 1205543473240 is 423743455021.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1205543473193 and 1205543473202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205543473249) 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, 27140089 + ... + 27184471.

It is an arithmetic number, because the mean of its divisors is an integer number (42488387100).

Almost surely, 2^{1205543473240} is an apocalyptic number.

1205543473240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205543473240 is an abundant number, since it is smaller than the sum of its proper divisors (1513713301160).

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

1205543473240 is a wasteful number, since it uses less digits than its factorization.

1205543473240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46076 (or 46072 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 40.

The spelling of 1205543473240 in words is "one trillion, two hundred five billion, five hundred forty-three million, four hundred seventy-three thousand, two hundred forty".