451661101049 has 2 divisors, whose sum is σ = 451661101050. Its totient is φ = 451661101048.

The previous prime is 451661100983. The next prime is 451661101057. The reversal of 451661101049 is 940101166154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393323394025 + 58337707024 = 627155^2 + 241532^2 .

It is a cyclic number.

It is not a de Polignac number, because 451661101049 - 2²⁴ = 451644323833 is a prime.

It is not a weakly prime, because it can be changed into another prime (451661101069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225830550524 + 225830550525.

It is an arithmetic number, because the mean of its divisors is an integer number (225830550525).

Almost surely, 2^451661101049 is an apocalyptic number.

It is an amenable number.

451661101049 is a deficient number, since it is larger than the sum of its proper divisors (1).

451661101049 is an equidigital number, since it uses as much as digits as its factorization.

451661101049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 451661101049 in words is "four hundred fifty-one billion, six hundred sixty-one million, one hundred one thousand, forty-nine".