53657173440 has 1680 divisors, whose sum is σ = 237770517600. Its totient is φ = 11370627072.

The previous prime is 53657173387. The next prime is 53657173463. The reversal of 53657173440 is 4437175635.

53657173440 is a `hidden beast` number, since 5 + 3 + 6 + 571 + 7 + 34 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1850247346 + ... + 1850247374.

It is an arithmetic number, because the mean of its divisors is an integer number (141530070).

Almost surely, 2^53657173440 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 53657173440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118885258800).

53657173440 is an abundant number, since it is smaller than the sum of its proper divisors (184113344160).

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

53657173440 is a wasteful number, since it uses less digits than its factorization.

53657173440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 53657173440 in words is "fifty-three billion, six hundred fifty-seven million, one hundred seventy-three thousand, four hundred forty".