53555964 has 96 divisors (see below), whose sum is σ = 157248000. Its totient is φ = 13781760.

The previous prime is 53555947. The next prime is 53555969. The reversal of 53555964 is 46955535.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53555969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137482 + ... + 137870.

It is an arithmetic number, because the mean of its divisors is an integer number (1638000).

Almost surely, 2^53555964 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 53555964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78624000).

53555964 is an abundant number, since it is smaller than the sum of its proper divisors (103692036).

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

53555964 is a wasteful number, since it uses less digits than its factorization.

53555964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 561 counting only the distinct ones).

The product of its digits is 405000, while the sum is 42.

The square root of 53555964 is about 7318.1940395155. The cubic root of 53555964 is about 376.9374431543.

The spelling of 53555964 in words is "fifty-three million, five hundred fifty-five thousand, nine hundred sixty-four".