55861053012 has 144 divisors (see below), whose sum is σ = 148286121984. Its totient is φ = 17710056000.

The previous prime is 55861053011. The next prime is 55861053029. The reversal of 55861053012 is 21035016855.

It is a happy number.

55861053012 is a `hidden beast` number, since 5 + 5 + 8 + 610 + 5 + 30 + 1 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55861053011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15641187 + ... + 15644757.

It is an arithmetic number, because the mean of its divisors is an integer number (1029764736).

Almost surely, 2^55861053012 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 55861053012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74143060992).

55861053012 is an abundant number, since it is smaller than the sum of its proper divisors (92425068972).

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

55861053012 is a wasteful number, since it uses less digits than its factorization.

55861053012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850 (or 3845 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 55861053012 its reverse (21035016855), we get a palindrome (76896069867).

The spelling of 55861053012 in words is "fifty-five billion, eight hundred sixty-one million, fifty-three thousand, twelve".