82371786381 has 16 divisors (see below), whose sum is σ = 122161176000. Its totient is φ = 54856519344.

The previous prime is 82371786379. The next prime is 82371786449. The reversal of 82371786381 is 18368717328.

It is not a de Polignac number, because 82371786381 - 2¹ = 82371786379 is a prime.

It is a super-2 number, since 2×82371786381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82371786881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1585206 + ... + 1636343.

It is an arithmetic number, because the mean of its divisors is an integer number (7635073500).

Almost surely, 2^82371786381 is an apocalyptic number.

It is an amenable number.

82371786381 is a deficient number, since it is larger than the sum of its proper divisors (39789389619).

82371786381 is a wasteful number, since it uses less digits than its factorization.

82371786381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222505 (or 3222499 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 82371786381 in words is "eighty-two billion, three hundred seventy-one million, seven hundred eighty-six thousand, three hundred eighty-one".