54787382081 has 4 divisors (see below), whose sum is σ = 54787853232. Its totient is φ = 54786910932.

The previous prime is 54787382021. The next prime is 54787382087. The reversal of 54787382081 is 18028378745.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54787382081 is a prime.

It is a super-2 number, since 2×54787382081² (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 (54787382087) 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, 77870 + ... + 340056.

It is an arithmetic number, because the mean of its divisors is an integer number (13696963308).

Almost surely, 2^54787382081 is an apocalyptic number.

It is an amenable number.

54787382081 is a deficient number, since it is larger than the sum of its proper divisors (471151).

54787382081 is a wasteful number, since it uses less digits than its factorization.

54787382081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471150.

The product of its (nonzero) digits is 3010560, while the sum is 53.

The spelling of 54787382081 in words is "fifty-four billion, seven hundred eighty-seven million, three hundred eighty-two thousand, eighty-one".