63641375 has 16 divisors (see below), whose sum is σ = 90772032. Its totient is φ = 43639200.

The previous prime is 63641371. The next prime is 63641381. The reversal of 63641375 is 57314636.

It is not a de Polignac number, because 63641375 - 2² = 63641371 is a prime.

It is a super-2 number, since 2×63641375² = 8100449223781250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63641371) 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, 35492 + ... + 37241.

It is an arithmetic number, because the mean of its divisors is an integer number (5673252).

Almost surely, 2^63641375 is an apocalyptic number.

63641375 is a deficient number, since it is larger than the sum of its proper divisors (27130657).

63641375 is an equidigital number, since it uses as much as digits as its factorization.

63641375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72755 (or 72745 counting only the distinct ones).

The product of its digits is 45360, while the sum is 35.

The square root of 63641375 is about 7977.5544498298. The cubic root of 63641375 is about 399.2514646943.

The spelling of 63641375 in words is "sixty-three million, six hundred forty-one thousand, three hundred seventy-five".