63445642 has 24 divisors (see below), whose sum is σ = 103543596. Its totient is φ = 29143296.

The previous prime is 63445621. The next prime is 63445651. The reversal of 63445642 is 24654436.

It can be written as a sum of positive squares in 6 ways, for example, as 68121 + 63377521 = 261^2 + 7961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63445598 and 63445607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113628 + ... + 114184.

Almost surely, 2^63445642 is an apocalyptic number.

63445642 is a deficient number, since it is larger than the sum of its proper divisors (40097954).

63445642 is a wasteful number, since it uses less digits than its factorization.

63445642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 909 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 63445642 is about 7965.2772707546. The cubic root of 63445642 is about 398.8417368032.

It can be divided in two parts, 634 and 45642, that multiplied together give a triangular number (28937028 = T₇₆₀₇).

The spelling of 63445642 in words is "sixty-three million, four hundred forty-five thousand, six hundred forty-two".