53403899640 has 1024 divisors, whose sum is σ = 224192102400. Its totient is φ = 9881118720.

The previous prime is 53403899629. The next prime is 53403899641. The reversal of 53403899640 is 4699830435.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53403899641) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1722706425 + ... + 1722706455.

It is an arithmetic number, because the mean of its divisors is an integer number (218937600).

Almost surely, 2^53403899640 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 53403899640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112096051200).

53403899640 is an abundant number, since it is smaller than the sum of its proper divisors (170788202760).

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

53403899640 is a wasteful number, since it uses less digits than its factorization.

53403899640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 53403899640 in words is "fifty-three billion, four hundred three million, eight hundred ninety-nine thousand, six hundred forty".