63915951 has 16 divisors (see below), whose sum is σ = 93742848. Its totient is φ = 38734520.

The previous prime is 63915949. The next prime is 63915959. The reversal of 63915951 is 15951936.

It is not a de Polignac number, because 63915951 - 2¹ = 63915949 is a prime.

It is a super-3 number, since 3×63915951³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63915959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4011 + ... + 11996.

It is an arithmetic number, because the mean of its divisors is an integer number (5858928).

Almost surely, 2^63915951 is an apocalyptic number.

63915951 is a deficient number, since it is larger than the sum of its proper divisors (29826897).

63915951 is a wasteful number, since it uses less digits than its factorization.

63915951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16043 (or 16021 counting only the distinct ones).

The product of its digits is 36450, while the sum is 39.

The square root of 63915951 is about 7994.7452117000. The cubic root of 63915951 is about 399.8248212088.

The spelling of 63915951 in words is "sixty-three million, nine hundred fifteen thousand, nine hundred fifty-one".