10642689579538 has 4 divisors (see below), whose sum is σ = 15964034369310. Its totient is φ = 5321344789768.

The previous prime is 10642689579433. The next prime is 10642689579547. The reversal of 10642689579538 is 83597598624601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7861109390289 + 2781580189249 = 2803767^2 + 1667807^2 .

It is a super-2 number, since 2×10642689579538² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2660672394883 + ... + 2660672394886.

It is a 1-persistent number, because it is pandigital, but 2⋅10642689579538 = 21285379159076 is not.

Almost surely, 2^{10642689579538} is an apocalyptic number.

10642689579538 is a deficient number, since it is larger than the sum of its proper divisors (5321344789772).

10642689579538 is an equidigital number, since it uses as much as digits as its factorization.

10642689579538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321344789771.

The product of its (nonzero) digits is 783820800, while the sum is 73.

The spelling of 10642689579538 in words is "ten trillion, six hundred forty-two billion, six hundred eighty-nine million, five hundred seventy-nine thousand, five hundred thirty-eight".