63898130438 has 4 divisors (see below), whose sum is σ = 95847195660. Its totient is φ = 31949065218.

The previous prime is 63898130411. The next prime is 63898130441. The reversal of 63898130438 is 83403189836.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63898130438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974532608 + ... + 15974532611.

It is an arithmetic number, because the mean of its divisors is an integer number (23961798915).

Almost surely, 2^63898130438 is an apocalyptic number.

63898130438 is a deficient number, since it is larger than the sum of its proper divisors (31949065222).

63898130438 is a wasteful number, since it uses less digits than its factorization.

63898130438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31949065221.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 63898130438 in words is "sixty-three billion, eight hundred ninety-eight million, one hundred thirty thousand, four hundred thirty-eight".