1561625345211 has 16 divisors (see below), whose sum is σ = 2103720528000. Its totient is φ = 1030307758848.

The previous prime is 1561625345209. The next prime is 1561625345219. The reversal of 1561625345211 is 1125435261651.

It is not a de Polignac number, because 1561625345211 - 2¹ = 1561625345209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1561625345219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7845720 + ... + 8042298.

It is an arithmetic number, because the mean of its divisors is an integer number (131482533000).

Almost surely, 2^{1561625345211} is an apocalyptic number.

1561625345211 is a deficient number, since it is larger than the sum of its proper divisors (542095182789).

1561625345211 is a wasteful number, since it uses less digits than its factorization.

1561625345211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223978.

The product of its digits is 216000, while the sum is 42.

The spelling of 1561625345211 in words is "one trillion, five hundred sixty-one billion, six hundred twenty-five million, three hundred forty-five thousand, two hundred eleven".