69640043236 has 9 divisors (see below), whose sum is σ = 121870999299. Its totient is φ = 34819757724.

The previous prime is 69640043203. The next prime is 69640043311. The reversal of 69640043236 is 63234004696.

The square root of 69640043236 is 263894.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69640043192 and 69640043201.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 461815 + ... + 593761.

Almost surely, 2^69640043236 is an apocalyptic number.

69640043236 is the 263894-th square number.

It is an amenable number.

69640043236 is a deficient number, since it is larger than the sum of its proper divisors (52230956063).

69640043236 is an frugal number, since it uses more digits than its factorization.

69640043236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263898 (or 131949 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 43.

The spelling of 69640043236 in words is "sixty-nine billion, six hundred forty million, forty-three thousand, two hundred thirty-six".