53309268544 has 315 divisors, whose sum is σ = 134583263091. Its totient is φ = 20946159360.

The previous prime is 53309268539. The next prime is 53309268547. The reversal of 53309268544 is 44586290335.

The square root of 53309268544 is 230888.

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

It is a super-2 number, since 2×53309268544² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53309268547) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1719653809 + ... + 1719653839.

Almost surely, 2^53309268544 is an apocalyptic number.

53309268544 is the 230888-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53309268544

53309268544 is an abundant number, since it is smaller than the sum of its proper divisors (81273994547).

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

53309268544 is an frugal number, since it uses more digits than its factorization.

53309268544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 49.

Multiplying 53309268544 by its sum of digits (49), we get a square (2612154158656 = 1616216²).

53309268544 divided by its sum of digits (49) gives a square (1087944256 = 32984²).

The spelling of 53309268544 in words is "fifty-three billion, three hundred nine million, two hundred sixty-eight thousand, five hundred forty-four".