4497311807921 has 2 divisors, whose sum is σ = 4497311807922. Its totient is φ = 4497311807920.

The previous prime is 4497311807909. The next prime is 4497311808007. The reversal of 4497311807921 is 1297081137944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2384751301696 + 2112560506225 = 1544264^2 + 1453465^2 .

It is a cyclic number.

It is not a de Polignac number, because 4497311807921 - 2³⁸ = 4222433900977 is a prime.

It is not a weakly prime, because it can be changed into another prime (4497311807221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2248655903960 + 2248655903961.

It is an arithmetic number, because the mean of its divisors is an integer number (2248655903961).

Almost surely, 2^{4497311807921} is an apocalyptic number.

It is an amenable number.

4497311807921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4497311807921 is an equidigital number, since it uses as much as digits as its factorization.

4497311807921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 4497311807921 in words is "four trillion, four hundred ninety-seven billion, three hundred eleven million, eight hundred seven thousand, nine hundred twenty-one".