54187959849 has 4 divisors (see below), whose sum is σ = 72250613136. Its totient is φ = 36125306564.

The previous prime is 54187959797. The next prime is 54187959851. The reversal of 54187959849 is 94895978145.

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 54187959849 - 2¹⁷ = 54187828777 is a prime.

It is a super-2 number, since 2×54187959849² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54187959869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9031326639 + ... + 9031326644.

It is an arithmetic number, because the mean of its divisors is an integer number (18062653284).

Almost surely, 2^54187959849 is an apocalyptic number.

It is an amenable number.

54187959849 is a deficient number, since it is larger than the sum of its proper divisors (18062653287).

54187959849 is a wasteful number, since it uses less digits than its factorization.

54187959849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18062653286.

The product of its digits is 130636800, while the sum is 69.

The spelling of 54187959849 in words is "fifty-four billion, one hundred eighty-seven million, nine hundred fifty-nine thousand, eight hundred forty-nine".