55432252440 has 96 divisors (see below), whose sum is σ = 182012201280. Its totient is φ = 14629533696.

The previous prime is 55432252439. The next prime is 55432252451. The reversal of 55432252440 is 4425223455.

55432252440 is a `hidden beast` number, since 5 + 543 + 22 + 52 + 4 + 40 = 666.

It is a super-2 number, since 2×55432252440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55432252395 and 55432252404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 758784 + ... + 828623.

It is an arithmetic number, because the mean of its divisors is an integer number (1895960430).

Almost surely, 2^55432252440 is an apocalyptic number.

It is an amenable number.

55432252440 is an abundant number, since it is smaller than the sum of its proper divisors (126579948840).

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

55432252440 is a wasteful number, since it uses less digits than its factorization.

55432252440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587521 (or 1587514 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 36.

Adding to 55432252440 its reverse (4425223455), we get a palindrome (59857475895).

The spelling of 55432252440 in words is "fifty-five billion, four hundred thirty-two million, two hundred fifty-two thousand, four hundred forty".