1561222831085 has 8 divisors (see below), whose sum is σ = 1887768675936. Its totient is φ = 1239444079120.

The previous prime is 1561222831061. The next prime is 1561222831123. The reversal of 1561222831085 is 5801382221651.

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

It is not a de Polignac number, because 1561222831085 - 2⁸ = 1561222830829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191772499 + ... + 1191773808.

It is an arithmetic number, because the mean of its divisors is an integer number (235971084492).

Almost surely, 2^{1561222831085} is an apocalyptic number.

It is an amenable number.

1561222831085 is a deficient number, since it is larger than the sum of its proper divisors (326545844851).

1561222831085 is a wasteful number, since it uses less digits than its factorization.

1561222831085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383546443.

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 1561222831085 in words is "one trillion, five hundred sixty-one billion, two hundred twenty-two million, eight hundred thirty-one thousand, eighty-five".