239909917636 has 27 divisors (see below), whose sum is σ = 431561325069. Its totient is φ = 116695299888.

The previous prime is 239909917567. The next prime is 239909917657. The reversal of 239909917636 is 636719909932.

The square root of 239909917636 is 489806.

It is a perfect power (a square), and thus also a powerful number.

239909917636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 214674688900 + 25235228736 = 463330^2 + 158856^2 .

It is a super-2 number, since 2×239909917636² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36242335 + ... + 36248953.

Almost surely, 2^239909917636 is an apocalyptic number.

239909917636 is the 489806-th square number.

It is an amenable number.

239909917636 is a deficient number, since it is larger than the sum of its proper divisors (191651407433).

239909917636 is an frugal number, since it uses more digits than its factorization.

239909917636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13316 (or 6658 counting only the distinct ones).

The product of its (nonzero) digits is 29760696, while the sum is 64.

Multiplying 239909917636 by its sum of digits (64), we get a square (15354234728704 = 3918448²).

The spelling of 239909917636 in words is "two hundred thirty-nine billion, nine hundred nine million, nine hundred seventeen thousand, six hundred thirty-six".