1213552364977 has 2 divisors, whose sum is σ = 1213552364978. Its totient is φ = 1213552364976.

The previous prime is 1213552364971. The next prime is 1213552365013. The reversal of 1213552364977 is 7794632553121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011520993536 + 202031371441 = 1005744^2 + 449479^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213552364977 - 2¹¹ = 1213552362929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213552364971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606776182488 + 606776182489.

It is an arithmetic number, because the mean of its divisors is an integer number (606776182489).

Almost surely, 2^{1213552364977} is an apocalyptic number.

It is an amenable number.

1213552364977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213552364977 is an equidigital number, since it uses as much as digits as its factorization.

1213552364977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 55.

The spelling of 1213552364977 in words is "one trillion, two hundred thirteen billion, five hundred fifty-two million, three hundred sixty-four thousand, nine hundred seventy-seven".