55259197668 has 18 divisors (see below), whose sum is σ = 139682971974. Its totient is φ = 18419732544.

The previous prime is 55259197657. The next prime is 55259197681. The reversal of 55259197668 is 86679195255.

55259197668 is a `hidden beast` number, since 552 + 5 + 9 + 1 + 9 + 76 + 6 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55172372544 + 86825124 = 234888^2 + 9318^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×55259197668² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 767488821 + ... + 767488892.

Almost surely, 2^55259197668 is an apocalyptic number.

It is an amenable number.

55259197668 is an abundant number, since it is smaller than the sum of its proper divisors (84423774306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55259197668 is a wasteful number, since it uses less digits than its factorization.

55259197668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534977723 (or 1534977718 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 63.

The spelling of 55259197668 in words is "fifty-five billion, two hundred fifty-nine million, one hundred ninety-seven thousand, six hundred sixty-eight".