205236978072 has 64 divisors (see below), whose sum is σ = 620884984320. Its totient is φ = 55189774848.

The previous prime is 205236978071. The next prime is 205236978077. The reversal of 205236978072 is 270879632502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205236978071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35927988 + ... + 35933699.

It is an arithmetic number, because the mean of its divisors is an integer number (9701327880).

Almost surely, 2^205236978072 is an apocalyptic number.

It is an amenable number.

205236978072 is an abundant number, since it is smaller than the sum of its proper divisors (415648006248).

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

205236978072 is a wasteful number, since it uses less digits than its factorization.

205236978072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71861720 (or 71861716 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 205236978072 in words is "two hundred five billion, two hundred thirty-six million, nine hundred seventy-eight thousand, seventy-two".