1958560081 has 4 divisors (see below), whose sum is σ = 1965481072. Its totient is φ = 1951639092.

The previous prime is 1958560073. The next prime is 1958560099. The reversal of 1958560081 is 1800658591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1958560081 - 2³ = 1958560073 is a prime.

It is a super-2 number, since 2×1958560081² = 7671915181773453122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1958560181) 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, 3460071 + ... + 3460636.

It is an arithmetic number, because the mean of its divisors is an integer number (491370268).

Almost surely, 2^1958560081 is an apocalyptic number.

It is an amenable number.

1958560081 is a deficient number, since it is larger than the sum of its proper divisors (6920991).

1958560081 is an equidigital number, since it uses as much as digits as its factorization.

1958560081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920990.

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 1958560081 is about 44255.6220270374. The cubic root of 1958560081 is about 1251.1584100839.

The spelling of 1958560081 in words is "one billion, nine hundred fifty-eight million, five hundred sixty thousand, eighty-one".