1976705378957 has 2 divisors, whose sum is σ = 1976705378958. Its totient is φ = 1976705378956.

The previous prime is 1976705378927. The next prime is 1976705379023. The reversal of 1976705378957 is 7598735076791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115176128361 + 861529250596 = 1056019^2 + 928186^2 .

It is an emirp because it is prime and its reverse (7598735076791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1976705378957 - 2⁸ = 1976705378701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1976705378927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988352689478 + 988352689479.

It is an arithmetic number, because the mean of its divisors is an integer number (988352689479).

Almost surely, 2^{1976705378957} is an apocalyptic number.

It is an amenable number.

1976705378957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976705378957 is an equidigital number, since it uses as much as digits as its factorization.

1976705378957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700131600, while the sum is 74.

The spelling of 1976705378957 in words is "one trillion, nine hundred seventy-six billion, seven hundred five million, three hundred seventy-eight thousand, nine hundred fifty-seven".