14354561981 has 4 divisors (see below), whose sum is σ = 14354831100. Its totient is φ = 14354292864.

The previous prime is 14354561971. The next prime is 14354562007. The reversal of 14354561981 is 18916545341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8171256025 + 6183305956 = 90395^2 + 78634^2 .

It is a cyclic number.

It is not a de Polignac number, because 14354561981 - 2¹⁸ = 14354299837 is a prime.

It is a super-2 number, since 2×14354561981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14354561971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24596 + ... + 171213.

It is an arithmetic number, because the mean of its divisors is an integer number (3588707775).

Almost surely, 2^14354561981 is an apocalyptic number.

It is an amenable number.

14354561981 is a deficient number, since it is larger than the sum of its proper divisors (269119).

14354561981 is an equidigital number, since it uses as much as digits as its factorization.

14354561981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269118.

The product of its digits is 518400, while the sum is 47.

The spelling of 14354561981 in words is "fourteen billion, three hundred fifty-four million, five hundred sixty-one thousand, nine hundred eighty-one".