55552573440 has 1360 divisors, whose sum is σ = 255783483648. Its totient is φ = 11211374592.

The previous prime is 55552573399. The next prime is 55552573451. The reversal of 55552573440 is 4437525555.

It is a happy number.

55552573440 is a `hidden beast` number, since 5 + 5 + 55 + 257 + 344 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2415329269 + ... + 2415329291.

Almost surely, 2^55552573440 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 55552573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127891741824).

55552573440 is an abundant number, since it is smaller than the sum of its proper divisors (200230910208).

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

55552573440 is an equidigital number, since it uses as much as digits as its factorization.

55552573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 2100000, while the sum is 45.

The spelling of 55552573440 in words is "fifty-five billion, five hundred fifty-two million, five hundred seventy-three thousand, four hundred forty".