55918026729 has 20 divisors (see below), whose sum is σ = 84358927620. Its totient is φ = 36909583200.

The previous prime is 55918026707. The next prime is 55918026737. The reversal of 55918026729 is 92762081955.

55918026729 is a `hidden beast` number, since 5 + 591 + 8 + 0 + 26 + 7 + 29 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37105161129 + 18812865600 = 192627^2 + 137160^2 .

It is not a de Polignac number, because 55918026729 - 2⁷ = 55918026601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55918026799) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3409374 + ... + 3425735.

It is an arithmetic number, because the mean of its divisors is an integer number (4217946381).

Almost surely, 2^55918026729 is an apocalyptic number.

It is an amenable number.

55918026729 is a deficient number, since it is larger than the sum of its proper divisors (28440900891).

55918026729 is a wasteful number, since it uses less digits than its factorization.

55918026729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6835222 (or 6835213 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 55918026729 in words is "fifty-five billion, nine hundred eighteen million, twenty-six thousand, seven hundred twenty-nine".