1641264162541 has 4 divisors (see below), whose sum is σ = 1641357598300. Its totient is φ = 1641170726784.

The previous prime is 1641264162511. The next prime is 1641264162557. The reversal of 1641264162541 is 1452614621461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172429240516 + 1468834922025 = 415246^2 + 1211955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641264162541 - 2⁵ = 1641264162509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641264162511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46691526 + ... + 46726663.

It is an arithmetic number, because the mean of its divisors is an integer number (410339399575).

Almost surely, 2^{1641264162541} is an apocalyptic number.

It is an amenable number.

1641264162541 is a deficient number, since it is larger than the sum of its proper divisors (93435759).

1641264162541 is an equidigital number, since it uses as much as digits as its factorization.

1641264162541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93435758.

The product of its digits is 276480, while the sum is 43.

The spelling of 1641264162541 in words is "one trillion, six hundred forty-one billion, two hundred sixty-four million, one hundred sixty-two thousand, five hundred forty-one".