55555586358721 has 4 divisors (see below), whose sum is σ = 57347702047744. Its totient is φ = 53763470669700.

The previous prime is 55555586358709. The next prime is 55555586358761. The reversal of 55555586358721 is 12785368555555.

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 55555586358721 - 2¹³ = 55555586350529 is a prime.

It is a super-2 number, since 2×55555586358721² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55555586358761) 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, 896057844465 + ... + 896057844526.

It is an arithmetic number, because the mean of its divisors is an integer number (14336925511936).

Almost surely, 2^{55555586358721} is an apocalyptic number.

It is an amenable number.

55555586358721 is a deficient number, since it is larger than the sum of its proper divisors (1792115689023).

55555586358721 is a wasteful number, since it uses less digits than its factorization.

55555586358721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792115689022.

The product of its digits is 1260000000, while the sum is 70.

The spelling of 55555586358721 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred eighty-six million, three hundred fifty-eight thousand, seven hundred twenty-one".