54561669 has 4 divisors (see below), whose sum is σ = 72748896. Its totient is φ = 36374444.

The previous prime is 54561659. The next prime is 54561671. The reversal of 54561669 is 96616545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54561669 is a prime.

It is a super-2 number, since 2×54561669² = 5953951448131122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 54561669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54561629) 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, 9093609 + ... + 9093614.

It is an arithmetic number, because the mean of its divisors is an integer number (18187224).

Almost surely, 2^54561669 is an apocalyptic number.

It is an amenable number.

54561669 is a deficient number, since it is larger than the sum of its proper divisors (18187227).

54561669 is a wasteful number, since it uses less digits than its factorization.

54561669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18187226.

The product of its digits is 194400, while the sum is 42.

The square root of 54561669 is about 7386.5871009554. The cubic root of 54561669 is about 379.2822763728.

The spelling of 54561669 in words is "fifty-four million, five hundred sixty-one thousand, six hundred sixty-nine".