1017209664 has 84 divisors (see below), whose sum is σ = 3023681024. Its totient is φ = 339064704.

The previous prime is 1017209659. The next prime is 1017209681. The reversal of 1017209664 is 4669027101.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17152 + ... + 48255.

Almost surely, 2^1017209664 is an apocalyptic number.

It is an amenable number.

1017209664 is an abundant number, since it is smaller than the sum of its proper divisors (2006471360).

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

1017209664 is an frugal number, since it uses more digits than its factorization.

1017209664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65434 (or 65412 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1017209664 is about 31893.7245237993. The cubic root of 1017209664 is about 1005.7039576738.

It can be divided in two parts, 1017 and 209664, that added together give a square (210681 = 459²).

The spelling of 1017209664 in words is "one billion, seventeen million, two hundred nine thousand, six hundred sixty-four".