53053981981 has 24 divisors (see below), whose sum is σ = 71772979712. Its totient is φ = 38160698400.

The previous prime is 53053981927. The next prime is 53053982011. The reversal of 53053981981 is 18918935035.

It is not a de Polignac number, because 53053981981 - 2⁹ = 53053981469 is a prime.

It is a super-2 number, since 2×53053981981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53053987981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2398125 + ... + 2420146.

Almost surely, 2^53053981981 is an apocalyptic number.

It is an amenable number.

53053981981 is a deficient number, since it is larger than the sum of its proper divisors (18718997731).

53053981981 is a wasteful number, since it uses less digits than its factorization.

53053981981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818313 (or 4818302 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 53053981981 in words is "fifty-three billion, fifty-three million, nine hundred eighty-one thousand, nine hundred eighty-one".