63161537 has 4 divisors (see below), whose sum is σ = 63183300. Its totient is φ = 63139776.

The previous prime is 63161489. The next prime is 63161587. The reversal of 63161537 is 73516136.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5340721 + 57820816 = 2311^2 + 7604^2 .

It is a cyclic number.

It is not a de Polignac number, because 63161537 - 2¹² = 63157441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63161587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5708 + ... + 12605.

It is an arithmetic number, because the mean of its divisors is an integer number (15795825).

Almost surely, 2^63161537 is an apocalyptic number.

It is an amenable number.

63161537 is a deficient number, since it is larger than the sum of its proper divisors (21763).

63161537 is a wasteful number, since it uses less digits than its factorization.

63161537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21762.

The product of its digits is 11340, while the sum is 32.

The square root of 63161537 is about 7947.4232931183. The cubic root of 63161537 is about 398.2455178154.

The spelling of 63161537 in words is "sixty-three million, one hundred sixty-one thousand, five hundred thirty-seven".