1205046781015 has 64 divisors (see below), whose sum is σ = 1886102599680. Its totient is φ = 716688023040.

The previous prime is 1205046781009. The next prime is 1205046781021. The reversal of 1205046781015 is 5101876405021.

It is an interprime number because it is at equal distance from previous prime (1205046781009) and next prime (1205046781021).

It is not a de Polignac number, because 1205046781015 - 2¹¹ = 1205046778967 is a prime.

It is a super-2 number, since 2×1205046781015² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3269677 + ... + 3619513.

It is an arithmetic number, because the mean of its divisors is an integer number (29470353120).

Almost surely, 2^{1205046781015} is an apocalyptic number.

1205046781015 is a deficient number, since it is larger than the sum of its proper divisors (681055818665).

1205046781015 is a wasteful number, since it uses less digits than its factorization.

1205046781015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350272.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 1205046781015 in words is "one trillion, two hundred five billion, forty-six million, seven hundred eighty-one thousand, fifteen".