1285799516731 has 2 divisors, whose sum is σ = 1285799516732. Its totient is φ = 1285799516730.

The previous prime is 1285799516717. The next prime is 1285799516753. The reversal of 1285799516731 is 1376159975821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285799516731 - 2¹¹ = 1285799514683 is a prime.

It is a super-2 number, since 2×1285799516731² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1285799516761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642899758365 + 642899758366.

It is an arithmetic number, because the mean of its divisors is an integer number (642899758366).

Almost surely, 2^{1285799516731} is an apocalyptic number.

1285799516731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285799516731 is an equidigital number, since it uses as much as digits as its factorization.

1285799516731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 64.

The spelling of 1285799516731 in words is "one trillion, two hundred eighty-five billion, seven hundred ninety-nine million, five hundred sixteen thousand, seven hundred thirty-one".