55618158240 has 144 divisors (see below), whose sum is σ = 189875485800. Its totient is φ = 14825373696.

The previous prime is 55618158221. The next prime is 55618158259. The reversal of 55618158240 is 4285181655.

55618158240 is a `hidden beast` number, since 5 + 5 + 61 + 8 + 1 + 582 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55618158221) and next prime (55618158259).

It can be written as a sum of positive squares in 4 ways, for example, as 17325930384 + 38292227856 = 131628^2 + 195684^2 .

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4268856 + ... + 4281864.

Almost surely, 2^55618158240 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 55618158240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94937742900).

55618158240 is an abundant number, since it is smaller than the sum of its proper divisors (134257327560).

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

55618158240 is a wasteful number, since it uses less digits than its factorization.

55618158240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15999 (or 15988 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 55618158240 in words is "fifty-five billion, six hundred eighteen million, one hundred fifty-eight thousand, two hundred forty".