53638765 has 8 divisors (see below), whose sum is σ = 64406808. Its totient is φ = 42884160.

The previous prime is 53638751. The next prime is 53638771. The reversal of 53638765 is 56783635.

It can be written as a sum of positive squares in 4 ways, for example, as 10355524 + 43283241 = 3218^2 + 6579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53638765 - 2¹³ = 53630573 is a prime.

It is a super-2 number, since 2×53638765² = 5754234221450450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11059 + ... + 15151.

It is an arithmetic number, because the mean of its divisors is an integer number (8050851).

Almost surely, 2^53638765 is an apocalyptic number.

It is an amenable number.

53638765 is a deficient number, since it is larger than the sum of its proper divisors (10768043).

53638765 is a wasteful number, since it uses less digits than its factorization.

53638765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719.

The product of its digits is 453600, while the sum is 43.

The square root of 53638765 is about 7323.8490563364. The cubic root of 53638765 is about 377.1315997216.

The spelling of 53638765 in words is "fifty-three million, six hundred thirty-eight thousand, seven hundred sixty-five".