10687221601631 has 4 divisors (see below), whose sum is σ = 10696999481592. Its totient is φ = 10677443721672.

The previous prime is 10687221601583. The next prime is 10687221601633. The reversal of 10687221601631 is 13610612278601.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10687221601631 is a prime.

It is a super-2 number, since 2×10687221601631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10687221601633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4888938341 + ... + 4888940526.

It is an arithmetic number, because the mean of its divisors is an integer number (2674249870398).

Almost surely, 2^{10687221601631} is an apocalyptic number.

10687221601631 is a deficient number, since it is larger than the sum of its proper divisors (9777879961).

10687221601631 is an equidigital number, since it uses as much as digits as its factorization.

10687221601631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9777879960.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 10687221601631 in words is "ten trillion, six hundred eighty-seven billion, two hundred twenty-one million, six hundred one thousand, six hundred thirty-one".