55399722723801 has 135 divisors (see below), whose sum is σ = 88774953267693. Its totient is φ = 34426416942720.

The previous prime is 55399722723721. The next prime is 55399722723841. The reversal of 55399722723801 is 10832722799355.

The square root of 55399722723801 is 7443099.

It is a perfect power (a square), and thus also a powerful number.

55399722723801 is a `hidden beast` number, since 5 + 5 + 399 + 7 + 2 + 2 + 7 + 238 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1909163975625 + 53490558748176 = 1381725^2 + 7313724^2 .

It is not a de Polignac number, because 55399722723801 - 2¹³ = 55399722715609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55399722723841) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 63169580775 + ... + 63169581651.

Almost surely, 2^{55399722723801} is an apocalyptic number.

55399722723801 is the 7443099-th square number.

55399722723801 is the 3721550-th centered octagonal number.

It is an amenable number.

55399722723801 is a deficient number, since it is larger than the sum of its proper divisors (33375230543892).

55399722723801 is an frugal number, since it uses more digits than its factorization.

55399722723801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 55399722723801 in words is "fifty-five trillion, three hundred ninety-nine billion, seven hundred twenty-two million, seven hundred twenty-three thousand, eight hundred one".