53815809792 has 144 divisors (see below), whose sum is σ = 145586827008. Its totient is φ = 17644462080.

The previous prime is 53815809787. The next prime is 53815809793. The reversal of 53815809792 is 29790851835.

It is a super-2 number, since 2×53815809792² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53815809793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30698388 + ... + 30700140.

It is an arithmetic number, because the mean of its divisors is an integer number (1011019632).

Almost surely, 2^53815809792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53815809792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72793413504).

53815809792 is an abundant number, since it is smaller than the sum of its proper divisors (91771017216).

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

53815809792 is a wasteful number, since it uses less digits than its factorization.

53815809792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406 (or 2392 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 53815809792 in words is "fifty-three billion, eight hundred fifteen million, eight hundred nine thousand, seven hundred ninety-two".