916191445093 has 4 divisors (see below), whose sum is σ = 928742012908. Its totient is φ = 903640877280.

The previous prime is 916191445073. The next prime is 916191445139. The reversal of 916191445093 is 390544191619.

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 597934120644 + 318257324449 = 773262^2 + 564143^2 .

It is a cyclic number.

It is not a de Polignac number, because 916191445093 - 2¹⁷ = 916191314021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 916191445093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916191445003) 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, 6275283798 + ... + 6275283943.

It is an arithmetic number, because the mean of its divisors is an integer number (232185503227).

Almost surely, 2^916191445093 is an apocalyptic number.

It is an amenable number.

916191445093 is a deficient number, since it is larger than the sum of its proper divisors (12550567815).

916191445093 is a wasteful number, since it uses less digits than its factorization.

916191445093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12550567814.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 916191445093 in words is "nine hundred sixteen billion, one hundred ninety-one million, four hundred forty-five thousand, ninety-three".