1646256241073 has 2 divisors, whose sum is σ = 1646256241074. Its totient is φ = 1646256241072.

The previous prime is 1646256241057. The next prime is 1646256241079. The reversal of 1646256241073 is 3701426526461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1496651284129 + 149604956944 = 1223377^2 + 386788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1646256241073 - 2⁴ = 1646256241057 is a prime.

It is a super-2 number, since 2×1646256241073² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1646256241079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823128120536 + 823128120537.

It is an arithmetic number, because the mean of its divisors is an integer number (823128120537).

Almost surely, 2^{1646256241073} is an apocalyptic number.

It is an amenable number.

1646256241073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646256241073 is an equidigital number, since it uses as much as digits as its factorization.

1646256241073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 1646256241073 in words is "one trillion, six hundred forty-six billion, two hundred fifty-six million, two hundred forty-one thousand, seventy-three".