61544430453 has 16 divisors (see below), whose sum is σ = 89913540096. Its totient is φ = 37135334640.

The previous prime is 61544430413. The next prime is 61544430487. The reversal of 61544430453 is 35403444516.

It is not a de Polignac number, because 61544430453 - 2¹⁷ = 61544299381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61544430413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4100401 + ... + 4115382.

It is an arithmetic number, because the mean of its divisors is an integer number (5619596256).

Almost surely, 2^61544430453 is an apocalyptic number.

It is an amenable number.

61544430453 is a deficient number, since it is larger than the sum of its proper divisors (28369109643).

61544430453 is a wasteful number, since it uses less digits than its factorization.

61544430453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216024.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 61544430453 its reverse (35403444516), we get a palindrome (96947874969).

The spelling of 61544430453 in words is "sixty-one billion, five hundred forty-four million, four hundred thirty thousand, four hundred fifty-three".