1977153246829 has 2 divisors, whose sum is σ = 1977153246830. Its totient is φ = 1977153246828.

The previous prime is 1977153246763. The next prime is 1977153246853. The reversal of 1977153246829 is 9286423517791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1927779518025 + 49373728804 = 1388445^2 + 222202^2 .

It is a cyclic number.

It is not a de Polignac number, because 1977153246829 - 2⁷ = 1977153246701 is a prime.

It is a super-2 number, since 2×1977153246829² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1977153246889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988576623414 + 988576623415.

It is an arithmetic number, because the mean of its divisors is an integer number (988576623415).

Almost surely, 2^{1977153246829} is an apocalyptic number.

It is an amenable number.

1977153246829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977153246829 is an equidigital number, since it uses as much as digits as its factorization.

1977153246829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 64.

The spelling of 1977153246829 in words is "one trillion, nine hundred seventy-seven billion, one hundred fifty-three million, two hundred forty-six thousand, eight hundred twenty-nine".