82611959640 has 192 divisors, whose sum is σ = 292249697760. Its totient is φ = 18623969280.

The previous prime is 82611959603. The next prime is 82611959693. The reversal of 82611959640 is 4695911628.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 333010 + ... + 525470.

Almost surely, 2^82611959640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82611959640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146124848880).

82611959640 is an abundant number, since it is smaller than the sum of its proper divisors (209637738120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82611959640 is a wasteful number, since it uses less digits than its factorization.

82611959640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192562 (or 192551 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 82611959640 in words is "eighty-two billion, six hundred eleven million, nine hundred fifty-nine thousand, six hundred forty".