1561114918016 has 16 divisors (see below), whose sum is σ = 3110033625990. Its totient is φ = 780557458944.

The previous prime is 1561114918003. The next prime is 1561114918031. The reversal of 1561114918016 is 6108194111651.

It can be written as a sum of positive squares in only one way, i.e., 1509222078016 + 51892840000 = 1228504^2 + 227800^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098105021 + ... + 6098105276.

Almost surely, 2^{1561114918016} is an apocalyptic number.

1561114918016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1561114918016 is a deficient number, since it is larger than the sum of its proper divisors (1548918707974).

1561114918016 is an equidigital number, since it uses as much as digits as its factorization.

1561114918016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12196210311 (or 12196210299 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 44.

The spelling of 1561114918016 in words is "one trillion, five hundred sixty-one billion, one hundred fourteen million, nine hundred eighteen thousand, sixteen".