977746861249 has 2 divisors, whose sum is σ = 977746861250. Its totient is φ = 977746861248.

The previous prime is 977746861243. The next prime is 977746861297. The reversal of 977746861249 is 942168647779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502033182849 + 475713678400 = 708543^2 + 689720^2 .

It is a cyclic number.

It is not a de Polignac number, because 977746861249 - 2¹⁵ = 977746828481 is a prime.

It is not a weakly prime, because it can be changed into another prime (977746861243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488873430624 + 488873430625.

It is an arithmetic number, because the mean of its divisors is an integer number (488873430625).

Almost surely, 2^977746861249 is an apocalyptic number.

It is an amenable number.

977746861249 is a deficient number, since it is larger than the sum of its proper divisors (1).

977746861249 is an equidigital number, since it uses as much as digits as its factorization.

977746861249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256048128, while the sum is 70.

The spelling of 977746861249 in words is "nine hundred seventy-seven billion, seven hundred forty-six million, eight hundred sixty-one thousand, two hundred forty-nine".