63161645 has 4 divisors (see below), whose sum is σ = 75793980. Its totient is φ = 50529312.

The previous prime is 63161633. The next prime is 63161653. The reversal of 63161645 is 54616136.

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 48706441 + 14455204 = 6979^2 + 3802^2 .

It is a cyclic number.

It is not a de Polignac number, because 63161645 - 2¹⁶ = 63096109 is a prime.

It is a super-3 number, since 3×63161645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6316160 + ... + 6316169.

It is an arithmetic number, because the mean of its divisors is an integer number (18948495).

Almost surely, 2^63161645 is an apocalyptic number.

It is an amenable number.

63161645 is a deficient number, since it is larger than the sum of its proper divisors (12632335).

63161645 is a wasteful number, since it uses less digits than its factorization.

63161645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12632334.

The product of its digits is 12960, while the sum is 32.

The square root of 63161645 is about 7947.4300877705. The cubic root of 63161645 is about 398.2457448021.

The spelling of 63161645 in words is "sixty-three million, one hundred sixty-one thousand, six hundred forty-five".