10091774977 has 4 divisors (see below), whose sum is σ = 10091978820. Its totient is φ = 10091571136.

The previous prime is 10091774971. The next prime is 10091774993. The reversal of 10091774977 is 77947719001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77947719001 = 182659 ⋅426739.

It can be written as a sum of positive squares in 2 ways, for example, as 3380724736 + 6711050241 = 58144^2 + 81921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10091774977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10091774971) 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, 25149 + ... + 144277.

It is an arithmetic number, because the mean of its divisors is an integer number (2522994705).

Almost surely, 2^10091774977 is an apocalyptic number.

It is an amenable number.

10091774977 is a deficient number, since it is larger than the sum of its proper divisors (203843).

10091774977 is an equidigital number, since it uses as much as digits as its factorization.

10091774977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203842.

The product of its (nonzero) digits is 777924, while the sum is 52.

The spelling of 10091774977 in words is "ten billion, ninety-one million, seven hundred seventy-four thousand, nine hundred seventy-seven".