2120553485658 has 24 divisors (see below), whose sum is σ = 4597339294548. Its totient is φ = 706419355392.

The previous prime is 2120553485647. The next prime is 2120553485723. The reversal of 2120553485658 is 8565843550212.

2120553485658 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 5 + 534 + 8 + 56 + 58 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1880225091369 + 240328394289 = 1371213^2 + 490233^2 .

It is a super-2 number, since 2×2120553485658² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35953591 + ... + 36012522.

Almost surely, 2^{2120553485658} is an apocalyptic number.

2120553485658 is an abundant number, since it is smaller than the sum of its proper divisors (2476785808890).

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

2120553485658 is a wasteful number, since it uses less digits than its factorization.

2120553485658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71967758 (or 71967755 counting only the distinct ones).

The product of its (nonzero) digits is 11520000, while the sum is 54.

The spelling of 2120553485658 in words is "two trillion, one hundred twenty billion, five hundred fifty-three million, four hundred eighty-five thousand, six hundred fifty-eight".