10000611981 has 96 divisors (see below), whose sum is σ = 16752528000. Its totient is φ = 5706215424.

The previous prime is 10000611961. The next prime is 10000612001. The reversal of 10000611981 is 18911600001.

It is an interprime number because it is at equal distance from previous prime (10000611961) and next prime (10000612001).

It is not a de Polignac number, because 10000611981 - 2¹⁰ = 10000610957 is a prime.

It is a super-2 number, since 2×10000611981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000611961) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26386650 + ... + 26387028.

It is an arithmetic number, because the mean of its divisors is an integer number (174505500).

Almost surely, 2^10000611981 is an apocalyptic number.

It is an amenable number.

10000611981 is a deficient number, since it is larger than the sum of its proper divisors (6751916019).

10000611981 is a wasteful number, since it uses less digits than its factorization.

10000611981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The spelling of 10000611981 in words is "ten billion, six hundred eleven thousand, nine hundred eighty-one".