63157645 has 4 divisors (see below), whose sum is σ = 75789180. Its totient is φ = 50526112.

The previous prime is 63157639. The next prime is 63157649. The reversal of 63157645 is 54675136.

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 31651876 + 31505769 = 5626^2 + 5613^2 .

It is a cyclic number.

It is not a de Polignac number, because 63157645 - 2³ = 63157637 is a prime.

It is a super-3 number, since 3×63157645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63157649) 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, 6315760 + ... + 6315769.

It is an arithmetic number, because the mean of its divisors is an integer number (18947295).

Almost surely, 2^63157645 is an apocalyptic number.

It is an amenable number.

63157645 is a deficient number, since it is larger than the sum of its proper divisors (12631535).

63157645 is a wasteful number, since it uses less digits than its factorization.

63157645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631534.

The product of its digits is 75600, while the sum is 37.

The square root of 63157645 is about 7947.1784301096. The cubic root of 63157645 is about 398.2373377136.

The spelling of 63157645 in words is "sixty-three million, one hundred fifty-seven thousand, six hundred forty-five".