205552657464 has 128 divisors (see below), whose sum is σ = 678370982400. Its totient is φ = 50249687040.

The previous prime is 205552657397. The next prime is 205552657477. The reversal of 205552657464 is 464756255502.

It is a super-2 number, since 2×205552657464² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3240049 + ... + 3302880.

It is an arithmetic number, because the mean of its divisors is an integer number (5299773300).

Almost surely, 2^205552657464 is an apocalyptic number.

205552657464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

205552657464 is an abundant number, since it is smaller than the sum of its proper divisors (472818324936).

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

205552657464 is a wasteful number, since it uses less digits than its factorization.

205552657464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542973 (or 6542969 counting only the distinct ones).

The product of its (nonzero) digits is 10080000, while the sum is 51.

The spelling of 205552657464 in words is "two hundred five billion, five hundred fifty-two million, six hundred fifty-seven thousand, four hundred sixty-four".