54120402145 has 4 divisors (see below), whose sum is σ = 64944482580. Its totient is φ = 43296321712.

The previous prime is 54120402131. The next prime is 54120402163.

54120402145 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40208671441 + 13911730704 = 200521^2 + 117948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54120402145 is a prime.

It is an unprimeable number.

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, 5412040210 + ... + 5412040219.

It is an arithmetic number, because the mean of its divisors is an integer number (16236120645).

Almost surely, 2^54120402145 is an apocalyptic number.

It is an amenable number.

54120402145 is a deficient number, since it is larger than the sum of its proper divisors (10824080435).

54120402145 is a wasteful number, since it uses less digits than its factorization.

54120402145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10824080434.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 54120402145 in words is "fifty-four billion, one hundred twenty million, four hundred two thousand, one hundred forty-five".