1205564455131 has 8 divisors (see below), whose sum is σ = 1622166239760. Its totient is φ = 796336153632.

The previous prime is 1205564455063. The next prime is 1205564455133. The reversal of 1205564455131 is 1315544655021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1205564455131 - 2¹³ = 1205564446939 is a prime.

It is a super-2 number, since 2×1205564455131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1205564455133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843370400 + ... + 1843371053.

It is an arithmetic number, because the mean of its divisors is an integer number (202770779970).

Almost surely, 2^{1205564455131} is an apocalyptic number.

1205564455131 is a deficient number, since it is larger than the sum of its proper divisors (416601784629).

1205564455131 is a wasteful number, since it uses less digits than its factorization.

1205564455131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686741565.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 1205564455131 in words is "one trillion, two hundred five billion, five hundred sixty-four million, four hundred fifty-five thousand, one hundred thirty-one".