671004826343557 has 2 divisors, whose sum is σ = 671004826343558. Its totient is φ = 671004826343556.

The previous prime is 671004826343519. The next prime is 671004826343681. The reversal of 671004826343557 is 755343628400176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601572453596676 + 69432372746881 = 24526974^2 + 8332609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671004826343557 is a prime.

It is a super-2 number, since 2×671004826343557² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 671004826343495 and 671004826343504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671004826344557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335502413171778 + 335502413171779.

It is an arithmetic number, because the mean of its divisors is an integer number (335502413171779).

Almost surely, 2^{671004826343557} is an apocalyptic number.

It is an amenable number.

671004826343557 is a deficient number, since it is larger than the sum of its proper divisors (1).

671004826343557 is an equidigital number, since it uses as much as digits as its factorization.

671004826343557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101606400, while the sum is 61.

The spelling of 671004826343557 in words is "six hundred seventy-one trillion, four billion, eight hundred twenty-six million, three hundred forty-three thousand, five hundred fifty-seven".