53111821940 has 24 divisors (see below), whose sum is σ = 118095698952. Its totient is φ = 19995038720.

The previous prime is 53111821937. The next prime is 53111821967. The reversal of 53111821940 is 4912811135.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15349227664 + 37762594276 = 123892^2 + 194326^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 53111821940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78105281 + ... + 78105960.

It is an arithmetic number, because the mean of its divisors is an integer number (4920654123).

Almost surely, 2^53111821940 is an apocalyptic number.

It is an amenable number.

53111821940 is an abundant number, since it is smaller than the sum of its proper divisors (64983877012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53111821940 is a wasteful number, since it uses less digits than its factorization.

53111821940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156211267 (or 156211265 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 53111821940 in words is "fifty-three billion, one hundred eleven million, eight hundred twenty-one thousand, nine hundred forty".