1561151051011 has 8 divisors (see below), whose sum is σ = 1582109316800. Its totient is φ = 1540222706880.

The previous prime is 1561151050931. The next prime is 1561151051021. The reversal of 1561151051011 is 1101501511651.

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 1561151051011 - 2⁷ = 1561151050883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561151051021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7375356 + ... + 7584073.

It is an arithmetic number, because the mean of its divisors is an integer number (197763664600).

Almost surely, 2^{1561151051011} is an apocalyptic number.

1561151051011 is a deficient number, since it is larger than the sum of its proper divisors (20958265789).

1561151051011 is a wasteful number, since it uses less digits than its factorization.

1561151051011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14960829.

The product of its (nonzero) digits is 750, while the sum is 28.

Adding to 1561151051011 its reverse (1101501511651), we get a palindrome (2662652562662).

The spelling of 1561151051011 in words is "one trillion, five hundred sixty-one billion, one hundred fifty-one million, fifty-one thousand, eleven".