61010643 has 4 divisors (see below), whose sum is σ = 81347528. Its totient is φ = 40673760.

The previous prime is 61010639. The next prime is 61010659. The reversal of 61010643 is 34601016.

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

It is not a de Polignac number, because 61010643 - 2² = 61010639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61010623) 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, 10168438 + ... + 10168443.

It is an arithmetic number, because the mean of its divisors is an integer number (20336882).

Almost surely, 2^61010643 is an apocalyptic number.

61010643 is a deficient number, since it is larger than the sum of its proper divisors (20336885).

61010643 is a wasteful number, since it uses less digits than its factorization.

61010643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20336884.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 61010643 is about 7810.9309944462. The cubic root of 61010643 is about 393.6726110442.

Adding to 61010643 its reverse (34601016), we get a palindrome (95611659).

The spelling of 61010643 in words is "sixty-one million, ten thousand, six hundred forty-three".