53426728990881 has 27 divisors (see below), whose sum is σ = 80136909999601. Its totient is φ = 35617424621868.

The previous prime is 53426728990847. The next prime is 53426728990889. The reversal of 53426728990881 is 18809982762435.

The square root of 53426728990881 is 7309359.

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

53426728990881 is a `hidden beast` number, since 5 + 3 + 4 + 267 + 289 + 9 + 0 + 8 + 81 = 666.

It is a tau number, because it is divible by the number of its divisors (27).

It is a de Polignac number, because none of the positive numbers 2^k-53426728990881 is a prime.

It is a super-2 number, since 2×53426728990881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53426728990889) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 592012960 + ... + 592103198.

It is a 2-persistent number, because it is pandigital, and so is 2⋅53426728990881 = 106853457981762, but 3⋅53426728990881 = 160280186972643 is not.

Almost surely, 2^{53426728990881} is an apocalyptic number.

53426728990881 is the 7309359-th square number.

53426728990881 is the 3654680-th centered octagonal number.

It is an amenable number.

53426728990881 is a deficient number, since it is larger than the sum of its proper divisors (26710181008720).

53426728990881 is an frugal number, since it uses more digits than its factorization.

53426728990881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180502 (or 90242 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 53426728990881 in words is "fifty-three trillion, four hundred twenty-six billion, seven hundred twenty-eight million, nine hundred ninety thousand, eight hundred eighty-one".