61061543 has 4 divisors (see below), whose sum is σ = 61161768. Its totient is φ = 60961320.

The previous prime is 61061513. The next prime is 61061551. The reversal of 61061543 is 34516016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61061543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61061503) 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, 49193 + ... + 50418.

It is an arithmetic number, because the mean of its divisors is an integer number (15290442).

Almost surely, 2^61061543 is an apocalyptic number.

61061543 is a deficient number, since it is larger than the sum of its proper divisors (100225).

61061543 is an equidigital number, since it uses as much as digits as its factorization.

61061543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100224.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 61061543 is about 7814.1885695189. The cubic root of 61061543 is about 393.7820584295.

Adding to 61061543 its reverse (34516016), we get a palindrome (95577559).

The spelling of 61061543 in words is "sixty-one million, sixty-one thousand, five hundred forty-three".