61436543 has 12 divisors (see below), whose sum is σ = 71627112. Its totient is φ = 52542000.

The previous prime is 61436509. The next prime is 61436561. The reversal of 61436543 is 34563416.

It is not a de Polignac number, because 61436543 - 2¹⁴ = 61420159 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61436503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26168 + ... + 28418.

It is an arithmetic number, because the mean of its divisors is an integer number (5968926).

Almost surely, 2^61436543 is an apocalyptic number.

61436543 is a deficient number, since it is larger than the sum of its proper divisors (10190569).

61436543 is a wasteful number, since it uses less digits than its factorization.

61436543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822 (or 2815 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 61436543 is about 7838.1466559385. The cubic root of 61436543 is about 394.5865309770.

Adding to 61436543 its reverse (34563416), we get a palindrome (95999959).

The spelling of 61436543 in words is "sixty-one million, four hundred thirty-six thousand, five hundred forty-three".