55982261665 has 8 divisors (see below), whose sum is σ = 73285869888. Its totient is φ = 40714372080.

The previous prime is 55982261653. The next prime is 55982261669. The reversal of 55982261665 is 56616228955.

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

It is not a de Polignac number, because 55982261665 - 2¹⁹ = 55981737377 is a prime.

It is a super-2 number, since 2×55982261665² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 1017859303 = 55982261665 / (5 + 5 + 9 + 8 + 2 + 2 + 6 + 1 + 6 + 6 + 5).

It is not an unprimeable number, because it can be changed into a prime (55982261669) 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, 508929597 + ... + 508929706.

It is an arithmetic number, because the mean of its divisors is an integer number (9160733736).

Almost surely, 2^55982261665 is an apocalyptic number.

55982261665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55982261665 is a deficient number, since it is larger than the sum of its proper divisors (17303608223).

55982261665 is a wasteful number, since it uses less digits than its factorization.

55982261665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017859319.

The product of its digits is 7776000, while the sum is 55.

The spelling of 55982261665 in words is "fifty-five billion, nine hundred eighty-two million, two hundred sixty-one thousand, six hundred sixty-five".