2171653164407 has 2 divisors, whose sum is σ = 2171653164408. Its totient is φ = 2171653164406.

The previous prime is 2171653164397. The next prime is 2171653164437. The reversal of 2171653164407 is 7044613561712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2171653164407 - 2¹² = 2171653160311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171653164437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085826582203 + 1085826582204.

It is an arithmetic number, because the mean of its divisors is an integer number (1085826582204).

Almost surely, 2^{2171653164407} is an apocalyptic number.

2171653164407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171653164407 is an equidigital number, since it uses as much as digits as its factorization.

2171653164407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 2171653164407 in words is "two trillion, one hundred seventy-one billion, six hundred fifty-three million, one hundred sixty-four thousand, four hundred seven".