205770412780 has 24 divisors (see below), whose sum is σ = 432126480240. Its totient is φ = 82306524480.

The previous prime is 205770412777. The next prime is 205770412811. The reversal of 205770412780 is 87214077502.

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, 1691395 + ... + 1808965.

It is an arithmetic number, because the mean of its divisors is an integer number (18005270010).

Almost surely, 2^205770412780 is an apocalyptic number.

205770412780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205770412780 is an abundant number, since it is smaller than the sum of its proper divisors (226356067460).

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

205770412780 is a wasteful number, since it uses less digits than its factorization.

205770412780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205089 (or 205087 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 43.

The spelling of 205770412780 in words is "two hundred five billion, seven hundred seventy million, four hundred twelve thousand, seven hundred eighty".