63625645 has 16 divisors (see below), whose sum is σ = 82818288. Its totient is φ = 46735360.

The previous prime is 63625643. The next prime is 63625693. The reversal of 63625645 is 54652636.

63625645 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in 8 ways, for example, as 5774409 + 57851236 = 2403^2 + 7606^2 .

It is not a de Polignac number, because 63625645 - 2¹ = 63625643 is a prime.

It is a super-3 number, since 3×63625645³ (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 (63625643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5644 + ... + 12613.

It is an arithmetic number, because the mean of its divisors is an integer number (5176143).

Almost surely, 2^63625645 is an apocalyptic number.

It is an amenable number.

63625645 is a deficient number, since it is larger than the sum of its proper divisors (19192643).

63625645 is a wasteful number, since it uses less digits than its factorization.

63625645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18320.

The product of its digits is 129600, while the sum is 37.

The square root of 63625645 is about 7976.5684977940. The cubic root of 63625645 is about 399.2185681548.

The spelling of 63625645 in words is "sixty-three million, six hundred twenty-five thousand, six hundred forty-five".