61554443 has 8 divisors (see below), whose sum is σ = 65033280. Its totient is φ = 58166080.

The previous prime is 61554431. The next prime is 61554497. The reversal of 61554443 is 34445516.

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 61554443 - 2¹⁶ = 61488907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61554413) 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, 21218 + ... + 23943.

It is an arithmetic number, because the mean of its divisors is an integer number (8129160).

Almost surely, 2^61554443 is an apocalyptic number.

61554443 is a deficient number, since it is larger than the sum of its proper divisors (3478837).

61554443 is a wasteful number, since it uses less digits than its factorization.

61554443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45237.

The product of its digits is 28800, while the sum is 32.

The square root of 61554443 is about 7845.6639617052. The cubic root of 61554443 is about 394.8387805459.

Adding to 61554443 its reverse (34445516), we get a palindrome (95999959).

The spelling of 61554443 in words is "sixty-one million, five hundred fifty-four thousand, four hundred forty-three".