401740651701671 has 2 divisors, whose sum is σ = 401740651701672. Its totient is φ = 401740651701670.

The previous prime is 401740651701647. The next prime is 401740651701751. The reversal of 401740651701671 is 176107156047104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401740651701671 is a prime.

It is a super-2 number, since 2×401740651701671² (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 (401740651701371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200870325850835 + 200870325850836.

It is an arithmetic number, because the mean of its divisors is an integer number (200870325850836).

Almost surely, 2^{401740651701671} is an apocalyptic number.

401740651701671 is a deficient number, since it is larger than the sum of its proper divisors (1).

401740651701671 is an equidigital number, since it uses as much as digits as its factorization.

401740651701671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 401740651701671 in words is "four hundred one trillion, seven hundred forty billion, six hundred fifty-one million, seven hundred one thousand, six hundred seventy-one".