646193150366371 has 2 divisors, whose sum is σ = 646193150366372. Its totient is φ = 646193150366370.

The previous prime is 646193150366341. The next prime is 646193150366417. The reversal of 646193150366371 is 173663051391646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646193150366371 - 2³⁷ = 646055711412899 is a prime.

It is a super-2 number, since 2×646193150366371² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (646193150366341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323096575183185 + 323096575183186.

It is an arithmetic number, because the mean of its divisors is an integer number (323096575183186).

Almost surely, 2^{646193150366371} is an apocalyptic number.

646193150366371 is a deficient number, since it is larger than the sum of its proper divisors (1).

646193150366371 is an equidigital number, since it uses as much as digits as its factorization.

646193150366371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44089920, while the sum is 61.

The spelling of 646193150366371 in words is "six hundred forty-six trillion, one hundred ninety-three billion, one hundred fifty million, three hundred sixty-six thousand, three hundred seventy-one".