6461687520499 has 2 divisors, whose sum is σ = 6461687520500. Its totient is φ = 6461687520498.

The previous prime is 6461687520347. The next prime is 6461687520503. The reversal of 6461687520499 is 9940257861646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6461687520499 - 2¹⁷ = 6461687389427 is a prime.

It is a super-2 number, since 2×6461687520499² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6461687529499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3230843760249 + 3230843760250.

It is an arithmetic number, because the mean of its divisors is an integer number (3230843760250).

Almost surely, 2^{6461687520499} is an apocalyptic number.

6461687520499 is a deficient number, since it is larger than the sum of its proper divisors (1).

6461687520499 is an equidigital number, since it uses as much as digits as its factorization.

6461687520499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 6461687520499 in words is "six trillion, four hundred sixty-one billion, six hundred eighty-seven million, five hundred twenty thousand, four hundred ninety-nine".