63612421636 has 6 divisors (see below), whose sum is σ = 111321737870. Its totient is φ = 31806210816.

The previous prime is 63612421589. The next prime is 63612421661.

It is a happy number.

63612421636 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 49426182400 + 14186239236 = 222320^2 + 119106^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7951552701 + ... + 7951552708.

Almost surely, 2^63612421636 is an apocalyptic number.

It is an amenable number.

63612421636 is a deficient number, since it is larger than the sum of its proper divisors (47709316234).

63612421636 is a wasteful number, since it uses less digits than its factorization.

63612421636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15903105413 (or 15903105411 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The spelling of 63612421636 in words is "sixty-three billion, six hundred twelve million, four hundred twenty-one thousand, six hundred thirty-six".