55500550381 has 4 divisors (see below), whose sum is σ = 58421632000. Its totient is φ = 52579468764.

The previous prime is 55500550373. The next prime is 55500550421. The reversal of 55500550381 is 18305500555.

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 55500550381 - 2³ = 55500550373 is a prime.

It is a super-2 number, since 2×55500550381² (a number of 22 digits) contains 22 as substring.

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 55500550381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500550681) 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, 1460540781 + ... + 1460540818.

It is an arithmetic number, because the mean of its divisors is an integer number (14605408000).

Almost surely, 2^55500550381 is an apocalyptic number.

It is an amenable number.

55500550381 is a deficient number, since it is larger than the sum of its proper divisors (2921081619).

55500550381 is a wasteful number, since it uses less digits than its factorization.

55500550381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921081618.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 55500550381 in words is "fifty-five billion, five hundred million, five hundred fifty thousand, three hundred eighty-one".