1649987418731 has 2 divisors, whose sum is σ = 1649987418732. Its totient is φ = 1649987418730.

The previous prime is 1649987418689. The next prime is 1649987418847. The reversal of 1649987418731 is 1378147899461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649987418731 is a prime.

It is a super-2 number, since 2×1649987418731² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1649987418031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824993709365 + 824993709366.

It is an arithmetic number, because the mean of its divisors is an integer number (824993709366).

Almost surely, 2^{1649987418731} is an apocalyptic number.

1649987418731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649987418731 is an equidigital number, since it uses as much as digits as its factorization.

1649987418731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 68.

The spelling of 1649987418731 in words is "one trillion, six hundred forty-nine billion, nine hundred eighty-seven million, four hundred eighteen thousand, seven hundred thirty-one".