53140021440 has 448 divisors, whose sum is σ = 191014502400. Its totient is φ = 12400128000.

The previous prime is 53140021433. The next prime is 53140021447. The reversal of 53140021440 is 4412004135.

It is an interprime number because it is at equal distance from previous prime (53140021433) and next prime (53140021447).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 53140021440.

It is not an unprimeable number, because it can be changed into a prime (53140021447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 88714261 + ... + 88714859.

Almost surely, 2^53140021440 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 53140021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95507251200).

53140021440 is an abundant number, since it is smaller than the sum of its proper divisors (137874480960).

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

53140021440 is a wasteful number, since it uses less digits than its factorization.

53140021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 53140021440 its reverse (4412004135), we get a palindrome (57552025575).

The spelling of 53140021440 in words is "fifty-three billion, one hundred forty million, twenty-one thousand, four hundred forty".