10685251001 has 4 divisors (see below), whose sum is σ = 10685462004. Its totient is φ = 10685040000.

The previous prime is 10685250997. The next prime is 10685251033. The reversal of 10685251001 is 10015258601.

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 5637006400 + 5048244601 = 75080^2 + 71051^2 .

It is a cyclic number.

It is not a de Polignac number, because 10685251001 - 2² = 10685250997 is a prime.

It is a super-2 number, since 2×10685251001² (a number of 21 digits) contains 22 as substring.

It is a deceptive number, since it divides R_10685251000.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10685251501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21101 + ... + 147701.

It is an arithmetic number, because the mean of its divisors is an integer number (2671365501).

Almost surely, 2^10685251001 is an apocalyptic number.

10685251001 is the 84401-st pentagonal number.

It is an amenable number.

10685251001 is a deficient number, since it is larger than the sum of its proper divisors (211003).

10685251001 is an equidigital number, since it uses as much as digits as its factorization.

10685251001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211002.

The product of its (nonzero) digits is 2400, while the sum is 29.

The spelling of 10685251001 in words is "ten billion, six hundred eighty-five million, two hundred fifty-one thousand, one".