55551565567 has 4 divisors (see below), whose sum is σ = 58819304736. Its totient is φ = 52283826400.

The previous prime is 55551565561. The next prime is 55551565579. The reversal of 55551565567 is 76556515555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55551565567 - 2¹⁹ = 55551041279 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 (55551565561) 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, 1633869559 + ... + 1633869592.

It is an arithmetic number, because the mean of its divisors is an integer number (14704826184).

Almost surely, 2^55551565567 is an apocalyptic number.

55551565567 is a deficient number, since it is larger than the sum of its proper divisors (3267739169).

55551565567 is a wasteful number, since it uses less digits than its factorization.

55551565567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267739168.

The product of its digits is 19687500, while the sum is 55.

The spelling of 55551565567 in words is "fifty-five billion, five hundred fifty-one million, five hundred sixty-five thousand, five hundred sixty-seven".