205977126354 has 16 divisors (see below), whose sum is σ = 412006487040. Its totient is φ = 68650336400.

The previous prime is 205977126331. The next prime is 205977126373. The reversal of 205977126354 is 453621779502.

It is a junction number, because it is equal to n+sod(n) for n = 205977126297 and 205977126306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125074 + ... + 2219885.

It is an arithmetic number, because the mean of its divisors is an integer number (25750405440).

Almost surely, 2^205977126354 is an apocalyptic number.

205977126354 is an abundant number, since it is smaller than the sum of its proper divisors (206029360686).

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

205977126354 is a wasteful number, since it uses less digits than its factorization.

205977126354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352865.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 205977126354 in words is "two hundred five billion, nine hundred seventy-seven million, one hundred twenty-six thousand, three hundred fifty-four".