54544378641 has 4 divisors (see below), whose sum is σ = 72725838192. Its totient is φ = 36362919092.

The previous prime is 54544378591. The next prime is 54544378661. The reversal of 54544378641 is 14687344545.

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 54544378641 - 2¹³ = 54544370449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54544378661) 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, 9090729771 + ... + 9090729776.

It is an arithmetic number, because the mean of its divisors is an integer number (18181459548).

Almost surely, 2^54544378641 is an apocalyptic number.

It is an amenable number.

54544378641 is a deficient number, since it is larger than the sum of its proper divisors (18181459551).

54544378641 is a wasteful number, since it uses less digits than its factorization.

54544378641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18181459550.

The product of its digits is 6451200, while the sum is 51.

The spelling of 54544378641 in words is "fifty-four billion, five hundred forty-four million, three hundred seventy-eight thousand, six hundred forty-one".