54721336897 has 4 divisors (see below), whose sum is σ = 57601407280. Its totient is φ = 51841266516.

The previous prime is 54721336871. The next prime is 54721336909. The reversal of 54721336897 is 79863312745.

54721336897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-54721336897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54721336807) 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, 1440035163 + ... + 1440035200.

It is an arithmetic number, because the mean of its divisors is an integer number (14400351820).

Almost surely, 2^54721336897 is an apocalyptic number.

It is an amenable number.

54721336897 is a deficient number, since it is larger than the sum of its proper divisors (2880070383).

54721336897 is a wasteful number, since it uses less digits than its factorization.

54721336897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880070382.

The product of its digits is 7620480, while the sum is 55.

The spelling of 54721336897 in words is "fifty-four billion, seven hundred twenty-one million, three hundred thirty-six thousand, eight hundred ninety-seven".