55771730020 has 24 divisors (see below), whose sum is σ = 117163477368. Its totient is φ = 22300531200.

The previous prime is 55771729999. The next prime is 55771730023. The reversal of 55771730020 is 2003717755.

It can be written as a sum of positive squares in 4 ways, for example, as 5789079396 + 49982650624 = 76086^2 + 223568^2 .

It is a super-2 number, since 2×55771730020² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55771730023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453861 + ... + 563500.

It is an arithmetic number, because the mean of its divisors is an integer number (4881811557).

Almost surely, 2^55771730020 is an apocalyptic number.

It is an amenable number.

55771730020 is an abundant number, since it is smaller than the sum of its proper divisors (61391747348).

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

55771730020 is a wasteful number, since it uses less digits than its factorization.

55771730020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020111 (or 1020109 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 37.

The spelling of 55771730020 in words is "fifty-five billion, seven hundred seventy-one million, seven hundred thirty thousand, twenty".