210055697424 has 30 divisors (see below), whose sum is σ = 587864209166. Its totient is φ = 70018565760.

The previous prime is 210055697393. The next prime is 210055697431. The reversal of 210055697424 is 424796550012.

210055697424 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 556 + 9 + 74 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 190123905024 + 19931792400 = 436032^2 + 141180^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 210055697424.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 729359917 + ... + 729360204.

Almost surely, 2^210055697424 is an apocalyptic number.

210055697424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

210055697424 is an abundant number, since it is smaller than the sum of its proper divisors (377808511742).

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

210055697424 is a wasteful number, since it uses less digits than its factorization.

210055697424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458720135 (or 1458720126 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 210055697424 in words is "two hundred ten billion, fifty-five million, six hundred ninety-seven thousand, four hundred twenty-four".