1561032131311 has 8 divisors (see below), whose sum is σ = 1603237994064. Its totient is φ = 1518827100480.

The previous prime is 1561032131251. The next prime is 1561032131317. The reversal of 1561032131311 is 1131312301651.

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

It is a cyclic number.

It is not a de Polignac number, because 1561032131311 - 2⁹ = 1561032130799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1561032131311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561032131317) 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, 6370776 + ... + 6611266.

It is an arithmetic number, because the mean of its divisors is an integer number (200404749258).

Almost surely, 2^{1561032131311} is an apocalyptic number.

1561032131311 is a deficient number, since it is larger than the sum of its proper divisors (42205862753).

1561032131311 is a wasteful number, since it uses less digits than its factorization.

1561032131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415961.

The product of its (nonzero) digits is 1620, while the sum is 28.

Adding to 1561032131311 its reverse (1131312301651), we get a palindrome (2692344432962).

The spelling of 1561032131311 in words is "one trillion, five hundred sixty-one billion, thirty-two million, one hundred thirty-one thousand, three hundred eleven".