61544251323 has 12 divisors (see below), whose sum is σ = 89777424048. Its totient is φ = 40623267600.

The previous prime is 61544251319. The next prime is 61544251367. The reversal of 61544251323 is 32315244516.

61544251323 is a `hidden beast` number, since 61 + 544 + 2 + 51 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 61544251323 - 2² = 61544251319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61544251303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33851815 + ... + 33853632.

It is an arithmetic number, because the mean of its divisors is an integer number (7481452004).

Almost surely, 2^61544251323 is an apocalyptic number.

61544251323 is a deficient number, since it is larger than the sum of its proper divisors (28233172725).

61544251323 is a wasteful number, since it uses less digits than its factorization.

61544251323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67705554 (or 67705551 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 61544251323 its reverse (32315244516), we get a palindrome (93859495839).

The spelling of 61544251323 in words is "sixty-one billion, five hundred forty-four million, two hundred fifty-one thousand, three hundred twenty-three".