874261045657861 has 2 divisors, whose sum is σ = 874261045657862. Its totient is φ = 874261045657860.

The previous prime is 874261045657829. The next prime is 874261045657919. The reversal of 874261045657861 is 168756540162478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 702902316413025 + 171358729244836 = 26512305^2 + 13090406^2 .

It is a cyclic number.

It is not a de Polignac number, because 874261045657861 - 2⁵ = 874261045657829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (874261045657661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437130522828930 + 437130522828931.

It is an arithmetic number, because the mean of its divisors is an integer number (437130522828931).

Almost surely, 2^{874261045657861} is an apocalyptic number.

It is an amenable number.

874261045657861 is a deficient number, since it is larger than the sum of its proper divisors (1).

874261045657861 is an equidigital number, since it uses as much as digits as its factorization.

874261045657861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 541900800, while the sum is 70.

The spelling of 874261045657861 in words is "eight hundred seventy-four trillion, two hundred sixty-one billion, forty-five million, six hundred fifty-seven thousand, eight hundred sixty-one".