82615276800 has 648 divisors, whose sum is σ = 343199700480. Its totient is φ = 18568396800.

The previous prime is 82615276787. The next prime is 82615276817. The reversal of 82615276800 is 867251628.

82615276800 is a `hidden beast` number, since 8 + 2 + 61 + 527 + 68 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 24593521 + ... + 24596879.

Almost surely, 2^82615276800 is an apocalyptic number.

82615276800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82615276800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171599850240).

82615276800 is an abundant number, since it is smaller than the sum of its proper divisors (260584423680).

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

82615276800 is a wasteful number, since it uses less digits than its factorization.

82615276800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3437 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 82615276800 in words is "eighty-two billion, six hundred fifteen million, two hundred seventy-six thousand, eight hundred".