63402620436 has 36 divisors (see below), whose sum is σ = 169695250452. Its totient is φ = 19891017984.

The previous prime is 63402620423. The next prime is 63402620497.

63402620436 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 47108097936 + 16294522500 = 217044^2 + 127650^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 63402620436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51798915 + ... + 51800138.

It is an arithmetic number, because the mean of its divisors is an integer number (4713756957).

Almost surely, 2^63402620436 is an apocalyptic number.

It is an amenable number.

63402620436 is an abundant number, since it is smaller than the sum of its proper divisors (106292630016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63402620436 is a wasteful number, since it uses less digits than its factorization.

63402620436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103599080 (or 103599075 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 63402620436 in words is "sixty-three billion, four hundred two million, six hundred twenty thousand, four hundred thirty-six".