1671730311261 has 24 divisors (see below), whose sum is σ = 2371270171104. Its totient is φ = 1047392684800.

The previous prime is 1671730311197. The next prime is 1671730311281. The reversal of 1671730311261 is 1621130371761.

It is not a de Polignac number, because 1671730311261 - 2⁶ = 1671730311197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671730311281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 819390 + ... + 2003711.

It is an arithmetic number, because the mean of its divisors is an integer number (98802923796).

Almost surely, 2^{1671730311261} is an apocalyptic number.

It is an amenable number.

1671730311261 is a deficient number, since it is larger than the sum of its proper divisors (699539859843).

1671730311261 is a wasteful number, since it uses less digits than its factorization.

1671730311261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823821 (or 2823804 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 39.

The spelling of 1671730311261 in words is "one trillion, six hundred seventy-one billion, seven hundred thirty million, three hundred eleven thousand, two hundred sixty-one".