13410021861 has 12 divisors (see below), whose sum is σ = 19558091488. Its totient is φ = 8853217704.

The previous prime is 13410021841. The next prime is 13410021883. The reversal of 13410021861 is 16812001431.

It is a happy number.

It is not a de Polignac number, because 13410021861 - 2⁵ = 13410021829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13410021841) 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 11 ways as a sum of consecutive naturals, for example, 7232095 + ... + 7233948.

Almost surely, 2^13410021861 is an apocalyptic number.

It is an amenable number.

13410021861 is a deficient number, since it is larger than the sum of its proper divisors (6148069627).

13410021861 is a wasteful number, since it uses less digits than its factorization.

13410021861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14466152 (or 14466149 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

It can be divided in two parts, 134100 and 21861, that added together give a triangular number (155961 = T₅₅₈).

The spelling of 13410021861 in words is "thirteen billion, four hundred ten million, twenty-one thousand, eight hundred sixty-one".