43554244444961 has 2 divisors, whose sum is σ = 43554244444962. Its totient is φ = 43554244444960.

The previous prime is 43554244444951. The next prime is 43554244445071. The reversal of 43554244444961 is 16944444245534.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37238748750736 + 6315495694225 = 6102356^2 + 2513065^2 .

It is a cyclic number.

It is not a de Polignac number, because 43554244444961 - 2²² = 43554240250657 is a prime.

It is a super-2 number, since 2×43554244444961² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43554244444961.

It is not a weakly prime, because it can be changed into another prime (43554244444951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21777122222480 + 21777122222481.

It is an arithmetic number, because the mean of its divisors is an integer number (21777122222481).

Almost surely, 2^{43554244444961} is an apocalyptic number.

It is an amenable number.

43554244444961 is a deficient number, since it is larger than the sum of its proper divisors (1).

43554244444961 is an equidigital number, since it uses as much as digits as its factorization.

43554244444961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132710400, while the sum is 59.

The spelling of 43554244444961 in words is "forty-three trillion, five hundred fifty-four billion, two hundred forty-four million, four hundred forty-four thousand, nine hundred sixty-one".