55321765567511 has 4 divisors (see below), whose sum is σ = 55551316462224. Its totient is φ = 55092214672800.

The previous prime is 55321765567501. The next prime is 55321765567547. The reversal of 55321765567511 is 11576556712355.

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 55321765567511 - 2³⁰ = 55320691825687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55321765567501) 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, 114775446995 + ... + 114775447476.

It is an arithmetic number, because the mean of its divisors is an integer number (13887829115556).

Almost surely, 2^{55321765567511} is an apocalyptic number.

55321765567511 is a deficient number, since it is larger than the sum of its proper divisors (229550894713).

55321765567511 is a wasteful number, since it uses less digits than its factorization.

55321765567511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229550894712.

The product of its digits is 33075000, while the sum is 59.

The spelling of 55321765567511 in words is "fifty-five trillion, three hundred twenty-one billion, seven hundred sixty-five million, five hundred sixty-seven thousand, five hundred eleven".