53565697061881 has 9 divisors (see below), whose sum is σ = 55052824529199. Its totient is φ = 52117712040744.

The previous prime is 53565697061873. The next prime is 53565697061897. The reversal of 53565697061881 is 18816079656535.

The square root of 53565697061881 is 7318859.

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

It can be written as a sum of positive squares in only one way, i.e., 47931321330025 + 5634375731856 = 6923245^2 + 2373684^2 .

It is not a de Polignac number, because 53565697061881 - 2³ = 53565697061873 is a prime.

It is a super-2 number, since 2×53565697061881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53565697061881.

It is not an unprimeable number, because it can be changed into a prime (53565697071881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 270698880 + ... + 270896686.

Almost surely, 2^{53565697061881} is an apocalyptic number.

53565697061881 is the 7318859-th square number.

53565697061881 is the 3659430-th centered octagonal number.

It is an amenable number.

53565697061881 is a deficient number, since it is larger than the sum of its proper divisors (1487127467318).

53565697061881 is an frugal number, since it uses more digits than its factorization.

53565697061881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395688 (or 197844 counting only the distinct ones).

The product of its (nonzero) digits is 326592000, while the sum is 70.

The spelling of 53565697061881 in words is "fifty-three trillion, five hundred sixty-five billion, six hundred ninety-seven million, sixty-one thousand, eight hundred eighty-one".