1016721677497 has 16 divisors (see below), whose sum is σ = 1042976647440. Its totient is φ = 990894643200.

The previous prime is 1016721677473. The next prime is 1016721677507. The reversal of 1016721677497 is 7947761276101.

It can be written as a sum of positive squares in 8 ways, for example, as 233432956201 + 783288721296 = 483149^2 + 885036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1016721677497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016721677417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1541047 + ... + 2099587.

It is an arithmetic number, because the mean of its divisors is an integer number (65186040465).

Almost surely, 2^{1016721677497} is an apocalyptic number.

It is an amenable number.

1016721677497 is a deficient number, since it is larger than the sum of its proper divisors (26254969943).

1016721677497 is a wasteful number, since it uses less digits than its factorization.

1016721677497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558924.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The spelling of 1016721677497 in words is "one trillion, sixteen billion, seven hundred twenty-one million, six hundred seventy-seven thousand, four hundred ninety-seven".