10165606581 has 8 divisors (see below), whose sum is σ = 14596768480. Its totient is φ = 6255757872.

The previous prime is 10165606573. The next prime is 10165606597. The reversal of 10165606581 is 18560656101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10165606581 - 2³ = 10165606573 is a prime.

It is a super-2 number, since 2×10165606581² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 260656579 = 10165606581 / (1 + 0 + 1 + 6 + 5 + 6 + 0 + 6 + 5 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10165606511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130328251 + ... + 130328328.

It is an arithmetic number, because the mean of its divisors is an integer number (1824596060).

Almost surely, 2^10165606581 is an apocalyptic number.

It is an amenable number.

10165606581 is a deficient number, since it is larger than the sum of its proper divisors (4431161899).

10165606581 is a wasteful number, since it uses less digits than its factorization.

10165606581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260656595.

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 10165606581 in words is "ten billion, one hundred sixty-five million, six hundred six thousand, five hundred eighty-one".