55811415869 has 8 divisors (see below), whose sum is σ = 61793915808. Its totient is φ = 49980371760.

The previous prime is 55811415857. The next prime is 55811415887. The reversal of 55811415869 is 96851411855.

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

It is a de Polignac number, because none of the positive numbers 2^k-55811415869 is a prime.

It is a super-2 number, since 2×55811415869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55811415869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55811412869) 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, 37863182 + ... + 37864655.

It is an arithmetic number, because the mean of its divisors is an integer number (7724239476).

Almost surely, 2^55811415869 is an apocalyptic number.

It is an amenable number.

55811415869 is a deficient number, since it is larger than the sum of its proper divisors (5982499939).

55811415869 is a wasteful number, since it uses less digits than its factorization.

55811415869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75727915.

The product of its digits is 1728000, while the sum is 53.

The spelling of 55811415869 in words is "fifty-five billion, eight hundred eleven million, four hundred fifteen thousand, eight hundred sixty-nine".