54005907621 has 4 divisors (see below), whose sum is σ = 72007876832. Its totient is φ = 36003938412.

The previous prime is 54005907583. The next prime is 54005907671. The reversal of 54005907621 is 12670950045.

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 not a de Polignac number, because 54005907621 - 2⁷ = 54005907493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54005907621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54005907671) 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, 9000984601 + ... + 9000984606.

It is an arithmetic number, because the mean of its divisors is an integer number (18001969208).

Almost surely, 2^54005907621 is an apocalyptic number.

It is an amenable number.

54005907621 is a deficient number, since it is larger than the sum of its proper divisors (18001969211).

54005907621 is a wasteful number, since it uses less digits than its factorization.

54005907621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18001969210.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 54005907621 in words is "fifty-four billion, five million, nine hundred seven thousand, six hundred twenty-one".