54645799681 has 4 divisors (see below), whose sum is σ = 59613599664. Its totient is φ = 49677999700.

The previous prime is 54645799673. The next prime is 54645799687. The reversal of 54645799681 is 18699754645.

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 not a de Polignac number, because 54645799681 - 2³ = 54645799673 is a prime.

It is a super-2 number, since 2×54645799681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54645799687) 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, 2483899975 + ... + 2483899996.

It is an arithmetic number, because the mean of its divisors is an integer number (14903399916).

Almost surely, 2^54645799681 is an apocalyptic number.

It is an amenable number.

54645799681 is a deficient number, since it is larger than the sum of its proper divisors (4967799983).

54645799681 is a wasteful number, since it uses less digits than its factorization.

54645799681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967799982.

The product of its digits is 65318400, while the sum is 64.

The spelling of 54645799681 in words is "fifty-four billion, six hundred forty-five million, seven hundred ninety-nine thousand, six hundred eighty-one".