63681475 has 48 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 41731200.

The previous prime is 63681467. The next prime is 63681491. The reversal of 63681475 is 57418636.

It is a happy number.

It is not a de Polignac number, because 63681475 - 2³ = 63681467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167836 + ... + 168214.

It is an arithmetic number, because the mean of its divisors is an integer number (1979040).

Almost surely, 2^63681475 is an apocalyptic number.

63681475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

63681475 is a deficient number, since it is larger than the sum of its proper divisors (31312445).

63681475 is a wasteful number, since it uses less digits than its factorization.

63681475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 455 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 63681475 is about 7980.0673556055. The cubic root of 63681475 is about 399.3353023043.

The spelling of 63681475 in words is "sixty-three million, six hundred eighty-one thousand, four hundred seventy-five".