671276878013957 has 2 divisors, whose sum is σ = 671276878013958. Its totient is φ = 671276878013956.

The previous prime is 671276878013893. The next prime is 671276878014013. The reversal of 671276878013957 is 759310878672176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670565578068961 + 711299944996 = 25895281^2 + 843386^2 .

It is a cyclic number.

It is not a de Polignac number, because 671276878013957 - 2⁶ = 671276878013893 is a prime.

It is a super-2 number, since 2×671276878013957² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671276878013257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335638439006978 + 335638439006979.

It is an arithmetic number, because the mean of its divisors is an integer number (335638439006979).

Almost surely, 2^{671276878013957} is an apocalyptic number.

It is an amenable number.

671276878013957 is a deficient number, since it is larger than the sum of its proper divisors (1).

671276878013957 is an equidigital number, since it uses as much as digits as its factorization.

671276878013957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1493614080, while the sum is 77.

The spelling of 671276878013957 in words is "six hundred seventy-one trillion, two hundred seventy-six billion, eight hundred seventy-eight million, thirteen thousand, nine hundred fifty-seven".