61838563 has 4 divisors (see below), whose sum is σ = 62450928. Its totient is φ = 61226200.

The previous prime is 61838509. The next prime is 61838599. The reversal of 61838563 is 36583816.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-61838563 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61838663) 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, 306031 + ... + 306232.

It is an arithmetic number, because the mean of its divisors is an integer number (15612732).

Almost surely, 2^61838563 is an apocalyptic number.

61838563 is a deficient number, since it is larger than the sum of its proper divisors (612365).

61838563 is a wasteful number, since it uses less digits than its factorization.

61838563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612364.

The product of its digits is 103680, while the sum is 40.

The square root of 61838563 is about 7863.7499324432. The cubic root of 61838563 is about 395.4453407947.

The spelling of 61838563 in words is "sixty-one million, eight hundred thirty-eight thousand, five hundred sixty-three".