63898154216 has 16 divisors (see below), whose sum is σ = 129025119300. Its totient is φ = 29491455744.

The previous prime is 63898154209. The next prime is 63898154219. The reversal of 63898154216 is 61245189836.

It can be written as a sum of positive squares in 2 ways, for example, as 54480228100 + 9417926116 = 233410^2 + 97046^2 .

It is a super-2 number, since 2×63898154216² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63898154219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307202561 + ... + 307202768.

Almost surely, 2^63898154216 is an apocalyptic number.

It is an amenable number.

63898154216 is an abundant number, since it is smaller than the sum of its proper divisors (65126965084).

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

63898154216 is a wasteful number, since it uses less digits than its factorization.

63898154216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614405348 (or 614405344 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The spelling of 63898154216 in words is "sixty-three billion, eight hundred ninety-eight million, one hundred fifty-four thousand, two hundred sixteen".