1541667351649 has 2 divisors, whose sum is σ = 1541667351650. Its totient is φ = 1541667351648.

The previous prime is 1541667351607. The next prime is 1541667351709. The reversal of 1541667351649 is 9461537661451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 959890467600 + 581776884049 = 979740^2 + 762743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1541667351649 - 2²⁵ = 1541633797217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1541667351593 and 1541667351602.

It is not a weakly prime, because it can be changed into another prime (1541667351449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770833675824 + 770833675825.

It is an arithmetic number, because the mean of its divisors is an integer number (770833675825).

Almost surely, 2^{1541667351649} is an apocalyptic number.

It is an amenable number.

1541667351649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541667351649 is an equidigital number, since it uses as much as digits as its factorization.

1541667351649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 58.

The spelling of 1541667351649 in words is "one trillion, five hundred forty-one billion, six hundred sixty-seven million, three hundred fifty-one thousand, six hundred forty-nine".