1020458958691 has 4 divisors (see below), whose sum is σ = 1021134313584. Its totient is φ = 1019783603800.

The previous prime is 1020458958683. The next prime is 1020458958749. The reversal of 1020458958691 is 1968598540201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020458958691 - 2³ = 1020458958683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020458958671) 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, 337675180 + ... + 337678201.

It is an arithmetic number, because the mean of its divisors is an integer number (255283578396).

Almost surely, 2^{1020458958691} is an apocalyptic number.

1020458958691 is a deficient number, since it is larger than the sum of its proper divisors (675354893).

1020458958691 is an equidigital number, since it uses as much as digits as its factorization.

1020458958691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675354892.

The product of its (nonzero) digits is 6220800, while the sum is 58.

The spelling of 1020458958691 in words is "one trillion, twenty billion, four hundred fifty-eight million, nine hundred fifty-eight thousand, six hundred ninety-one".