63542491 has 8 divisors (see below), whose sum is σ = 66643200. Its totient is φ = 60469992.

The previous prime is 63542489. The next prime is 63542503. The reversal of 63542491 is 19424536.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63542491 - 2¹ = 63542489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63542411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365 + ... + 11518.

It is an arithmetic number, because the mean of its divisors is an integer number (8330400).

Almost surely, 2^63542491 is an apocalyptic number.

63542491 is a deficient number, since it is larger than the sum of its proper divisors (3100709).

63542491 is a wasteful number, since it uses less digits than its factorization.

63542491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105.

The product of its digits is 25920, while the sum is 34.

The square root of 63542491 is about 7971.3544018567. The cubic root of 63542491 is about 399.0445759793.

The spelling of 63542491 in words is "sixty-three million, five hundred forty-two thousand, four hundred ninety-one".