55143520020 has 72 divisors (see below), whose sum is σ = 167839720776. Its totient is φ = 14654737152.

The previous prime is 55143519989. The next prime is 55143520139. The reversal of 55143520020 is 2002534155.

It is a happy number.

55143520020 is a `hidden beast` number, since 5 + 5 + 1 + 435 + 200 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 36889348356 + 18254171664 = 192066^2 + 135108^2 .

It is a super-2 number, since 2×55143520020² (a number of 22 digits) contains 22 as substring.

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, 470047 + ... + 575526.

It is an arithmetic number, because the mean of its divisors is an integer number (2331107233).

Almost surely, 2^55143520020 is an apocalyptic number.

It is an amenable number.

55143520020 is an abundant number, since it is smaller than the sum of its proper divisors (112696200756).

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

55143520020 is a wasteful number, since it uses less digits than its factorization.

55143520020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045881 (or 1045876 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 55143520020 in words is "fifty-five billion, one hundred forty-three million, five hundred twenty thousand, twenty".