54556981901 has 4 divisors (see below), whose sum is σ = 55586358972. Its totient is φ = 53527604832.

The previous prime is 54556981883. The next prime is 54556981937. The reversal of 54556981901 is 10918965545.

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 31071112900 + 23485869001 = 176270^2 + 153251^2 .

It is a cyclic number.

It is not a de Polignac number, because 54556981901 - 2³⁰ = 53483240077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1029377017 = 54556981901 / (5 + 4 + 5 + 5 + 6 + 9 + 8 + 1 + 9 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54556981951) 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, 514688456 + ... + 514688561.

It is an arithmetic number, because the mean of its divisors is an integer number (13896589743).

Almost surely, 2^54556981901 is an apocalyptic number.

It is an amenable number.

54556981901 is a deficient number, since it is larger than the sum of its proper divisors (1029377071).

54556981901 is a wasteful number, since it uses less digits than its factorization.

54556981901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029377070.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 54556981901 in words is "fifty-four billion, five hundred fifty-six million, nine hundred eighty-one thousand, nine hundred one".