205455431512 has 16 divisors (see below), whose sum is σ = 390654694800. Its totient is φ = 101280846240.

The previous prime is 205455431483. The next prime is 205455431539. The reversal of 205455431512 is 215134554502.

It is a super-2 number, since 2×205455431512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 180858087 + ... + 180859222.

It is an arithmetic number, because the mean of its divisors is an integer number (24415918425).

Almost surely, 2^205455431512 is an apocalyptic number.

It is an amenable number.

205455431512 is a deficient number, since it is larger than the sum of its proper divisors (185199263288).

205455431512 is a wasteful number, since it uses less digits than its factorization.

205455431512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361717386 (or 361717382 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 205455431512 in words is "two hundred five billion, four hundred fifty-five million, four hundred thirty-one thousand, five hundred twelve".