16948813561 has 16 divisors (see below), whose sum is σ = 18909624960. Its totient is φ = 15096810240.

The previous prime is 16948813543. The next prime is 16948813571. The reversal of 16948813561 is 16531884961.

It is not a de Polignac number, because 16948813561 - 2⁵ = 16948813529 is a prime.

It is a super-2 number, since 2×16948813561² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16948813499 and 16948813508.

It is not an unprimeable number, because it can be changed into a prime (16948813501) 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, 295716 + ... + 348346.

It is an arithmetic number, because the mean of its divisors is an integer number (1181851560).

Almost surely, 2^16948813561 is an apocalyptic number.

It is an amenable number.

16948813561 is a deficient number, since it is larger than the sum of its proper divisors (1960811399).

16948813561 is a wasteful number, since it uses less digits than its factorization.

16948813561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53664.

The product of its digits is 1244160, while the sum is 52.

The spelling of 16948813561 in words is "sixteen billion, nine hundred forty-eight million, eight hundred thirteen thousand, five hundred sixty-one".