53473136640 has 832 divisors, whose sum is σ = 217406177280. Its totient is φ = 10899947520.

The previous prime is 53473136611. The next prime is 53473136681. The reversal of 53473136640 is 4663137435.

It is a super-2 number, since 2×53473136640² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 53473136592 and 53473136601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 421048257 + ... + 421048383.

Almost surely, 2^53473136640 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 53473136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108703088640).

53473136640 is an abundant number, since it is smaller than the sum of its proper divisors (163933040640).

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

53473136640 is a wasteful number, since it uses less digits than its factorization.

53473136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 42.

The spelling of 53473136640 in words is "fifty-three billion, four hundred seventy-three million, one hundred thirty-six thousand, six hundred forty".