204955978782 has 96 divisors (see below), whose sum is σ = 468116743680. Its totient is φ = 59619179520.

The previous prime is 204955978781. The next prime is 204955978783. The reversal of 204955978782 is 287879559402.

It is an interprime number because it is at equal distance from previous prime (204955978781) and next prime (204955978783).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204955978781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1482282 + ... + 1614642.

It is an arithmetic number, because the mean of its divisors is an integer number (4876216080).

Almost surely, 2^204955978782 is an apocalyptic number.

204955978782 is an abundant number, since it is smaller than the sum of its proper divisors (263160764898).

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

204955978782 is a wasteful number, since it uses less digits than its factorization.

204955978782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132466 (or 132449 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 66.

The spelling of 204955978782 in words is "two hundred four billion, nine hundred fifty-five million, nine hundred seventy-eight thousand, seven hundred eighty-two".