63161988 has 12 divisors (see below), whose sum is σ = 147378000. Its totient is φ = 21053992.

The previous prime is 63161983. The next prime is 63161999. The reversal of 63161988 is 88916136.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×63161988³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (63161983) 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, 2631738 + ... + 2631761.

It is an arithmetic number, because the mean of its divisors is an integer number (12281500).

Almost surely, 2^63161988 is an apocalyptic number.

It is an amenable number.

63161988 is an abundant number, since it is smaller than the sum of its proper divisors (84216012).

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

63161988 is a wasteful number, since it uses less digits than its factorization.

63161988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263506 (or 5263504 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 63161988 is about 7947.4516670440. The cubic root of 63161988 is about 398.2464656934.

The spelling of 63161988 in words is "sixty-three million, one hundred sixty-one thousand, nine hundred eighty-eight".