55809767487 has 8 divisors (see below), whose sum is σ = 75354960640. Its totient is φ = 36735543000.

The previous prime is 55809767443. The next prime is 55809767501. The reversal of 55809767487 is 78476790855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55809767487 - 2⁶ = 55809767423 is a prime.

It is a super-2 number, since 2×55809767487² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55809767987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117741889 + ... + 117742362.

It is an arithmetic number, because the mean of its divisors is an integer number (9419370080).

Almost surely, 2^55809767487 is an apocalyptic number.

55809767487 is a deficient number, since it is larger than the sum of its proper divisors (19545193153).

55809767487 is a wasteful number, since it uses less digits than its factorization.

55809767487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235484333.

The product of its (nonzero) digits is 118540800, while the sum is 66.

The spelling of 55809767487 in words is "fifty-five billion, eight hundred nine million, seven hundred sixty-seven thousand, four hundred eighty-seven".