4031494329521 has 2 divisors, whose sum is σ = 4031494329522. Its totient is φ = 4031494329520.

The previous prime is 4031494329509. The next prime is 4031494329617. The reversal of 4031494329521 is 1259234941304.

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., 2364555119521 + 1666939210000 = 1537711^2 + 1291100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4031494329521 is a prime.

It is not a weakly prime, because it can be changed into another prime (4031494320521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015747164760 + 2015747164761.

It is an arithmetic number, because the mean of its divisors is an integer number (2015747164761).

Almost surely, 2^{4031494329521} is an apocalyptic number.

It is an amenable number.

4031494329521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4031494329521 is an equidigital number, since it uses as much as digits as its factorization.

4031494329521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 4031494329521 in words is "four trillion, thirty-one billion, four hundred ninety-four million, three hundred twenty-nine thousand, five hundred twenty-one".