205154757320 has 16 divisors (see below), whose sum is σ = 461598204060. Its totient is φ = 82061902912.

The previous prime is 205154757319. The next prime is 205154757373. The reversal of 205154757320 is 23757451502.

It can be written as a sum of positive squares in 2 ways, for example, as 204327504676 + 827252644 = 452026^2 + 28762^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564434427 + ... + 2564434506.

Almost surely, 2^205154757320 is an apocalyptic number.

205154757320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205154757320 is an abundant number, since it is smaller than the sum of its proper divisors (256443446740).

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

205154757320 is a wasteful number, since it uses less digits than its factorization.

205154757320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128868944 (or 5128868940 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 41.

The spelling of 205154757320 in words is "two hundred five billion, one hundred fifty-four million, seven hundred fifty-seven thousand, three hundred twenty".