53409475548 has 384 divisors, whose sum is σ = 168946606080. Its totient is φ = 14370048000.

The previous prime is 53409475529. The next prime is 53409475549. The reversal of 53409475548 is 84557490435.

It is a happy number.

53409475548 is a `hidden beast` number, since 5 + 3 + 4 + 0 + 94 + 7 + 5 + 548 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 53409475494 and 53409475503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53409475549) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 134532486 + ... + 134532882.

It is an arithmetic number, because the mean of its divisors is an integer number (439965120).

Almost surely, 2^53409475548 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 53409475548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84473303040).

53409475548 is an abundant number, since it is smaller than the sum of its proper divisors (115537130532).

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

53409475548 is a wasteful number, since it uses less digits than its factorization.

53409475548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 53409475548 in words is "fifty-three billion, four hundred nine million, four hundred seventy-five thousand, five hundred forty-eight".