54180991751 has 4 divisors (see below), whose sum is σ = 54182819712. Its totient is φ = 54179163792.

The previous prime is 54180991727. The next prime is 54180991757. The reversal of 54180991751 is 15719908145.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54180991751 - 2²² = 54176797447 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 54180991751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54180991757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868775 + ... + 929048.

It is an arithmetic number, because the mean of its divisors is an integer number (13545704928).

Almost surely, 2^54180991751 is an apocalyptic number.

54180991751 is a deficient number, since it is larger than the sum of its proper divisors (1827961).

54180991751 is a wasteful number, since it uses less digits than its factorization.

54180991751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827960.

The product of its (nonzero) digits is 453600, while the sum is 50.

The spelling of 54180991751 in words is "fifty-four billion, one hundred eighty million, nine hundred ninety-one thousand, seven hundred fifty-one".