53309969881 has 6 divisors (see below), whose sum is σ = 62013638490. Its totient is φ = 45694259856.

The previous prime is 53309969861. The next prime is 53309969887. The reversal of 53309969881 is 18896990335.

53309969881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53215569225 + 94400656 = 230685^2 + 9716^2 .

It is not a de Polignac number, because 53309969881 - 2⁷ = 53309969753 is a prime.

It is a super-2 number, since 2×53309969881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53309969887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 543979236 + ... + 543979333.

It is an arithmetic number, because the mean of its divisors is an integer number (10335606415).

Almost surely, 2^53309969881 is an apocalyptic number.

It is an amenable number.

53309969881 is a deficient number, since it is larger than the sum of its proper divisors (8703668609).

53309969881 is a wasteful number, since it uses less digits than its factorization.

53309969881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087958583 (or 1087958576 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 53309969881 in words is "fifty-three billion, three hundred nine million, nine hundred sixty-nine thousand, eight hundred eighty-one".