55101004591 has 4 divisors (see below), whose sum is σ = 56878456384. Its totient is φ = 53323552800.

The previous prime is 55101004493. The next prime is 55101004603. The reversal of 55101004591 is 19540010155.

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 55101004591 - 2¹¹ = 55101002543 is a prime.

It is a super-2 number, since 2×55101004591² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1777451761 = 55101004591 / (5 + 5 + 1 + 0 + 1 + 0 + 0 + 4 + 5 + 9 + 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 (55101004391) 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, 888725850 + ... + 888725911.

It is an arithmetic number, because the mean of its divisors is an integer number (14219614096).

Almost surely, 2^55101004591 is an apocalyptic number.

55101004591 is a deficient number, since it is larger than the sum of its proper divisors (1777451793).

55101004591 is a wasteful number, since it uses less digits than its factorization.

55101004591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777451792.

The product of its (nonzero) digits is 4500, while the sum is 31.

It can be divided in two parts, 5510 and 1004591, that added together give a palindrome (1010101).

The spelling of 55101004591 in words is "fifty-five billion, one hundred one million, four thousand, five hundred ninety-one".