55238662645857 has 40 divisors (see below), whose sum is σ = 84534908146920. Its totient is φ = 35925339836160.

The previous prime is 55238662645813. The next prime is 55238662645861. The reversal of 55238662645857 is 75854626683255.

55238662645857 is a `hidden beast` number, since 5 + 5 + 2 + 38 + 6 + 6 + 2 + 6 + 4 + 585 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4059576195921 + 51179086449936 = 2014839^2 + 7153956^2 .

It is not a de Polignac number, because 55238662645857 - 2⁷ = 55238662645729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55238662645807) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53464519 + ... + 54487907.

It is an arithmetic number, because the mean of its divisors is an integer number (2113372703673).

Almost surely, 2^{55238662645857} is an apocalyptic number.

It is an amenable number.

55238662645857 is a deficient number, since it is larger than the sum of its proper divisors (29296245501063).

55238662645857 is a wasteful number, since it uses less digits than its factorization.

55238662645857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039695 (or 1039686 counting only the distinct ones).

The product of its digits is 2903040000, while the sum is 72.

The spelling of 55238662645857 in words is "fifty-five trillion, two hundred thirty-eight billion, six hundred sixty-two million, six hundred forty-five thousand, eight hundred fifty-seven".