10990601857 has 4 divisors (see below), whose sum is σ = 10990862640. Its totient is φ = 10990341076.

The previous prime is 10990601821. The next prime is 10990601879. The reversal of 10990601857 is 75810609901.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75810609901 = 13 ⋅5831585377.

It is a cyclic number.

It is not a de Polignac number, because 10990601857 - 2¹⁹ = 10990077569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10990601257) 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, 51103 + ... + 156820.

It is an arithmetic number, because the mean of its divisors is an integer number (2747715660).

Almost surely, 2^10990601857 is an apocalyptic number.

It is an amenable number.

10990601857 is a deficient number, since it is larger than the sum of its proper divisors (260783).

10990601857 is an equidigital number, since it uses as much as digits as its factorization.

10990601857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260782.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 10990601857 in words is "ten billion, nine hundred ninety million, six hundred one thousand, eight hundred fifty-seven".