1658881860941 has 4 divisors (see below), whose sum is σ = 1659103733052. Its totient is φ = 1658659988832.

The previous prime is 1658881860901. The next prime is 1658881860983. The reversal of 1658881860941 is 1490681888561.

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 1385505555625 + 273376305316 = 1177075^2 + 522854^2 .

It is a cyclic number.

It is not a de Polignac number, because 1658881860941 - 2³⁴ = 1641701991757 is a prime.

It is a super-2 number, since 2×1658881860941² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1658881860901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110924840 + ... + 110939793.

It is an arithmetic number, because the mean of its divisors is an integer number (414775933263).

Almost surely, 2^{1658881860941} is an apocalyptic number.

It is an amenable number.

1658881860941 is a deficient number, since it is larger than the sum of its proper divisors (221872111).

1658881860941 is an equidigital number, since it uses as much as digits as its factorization.

1658881860941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221872110.

The product of its (nonzero) digits is 26542080, while the sum is 65.

The spelling of 1658881860941 in words is "one trillion, six hundred fifty-eight billion, eight hundred eighty-one million, eight hundred sixty thousand, nine hundred forty-one".