82385805978 has 48 divisors (see below), whose sum is σ = 204277746816. Its totient is φ = 23507094240.

The previous prime is 82385805959. The next prime is 82385806001. The reversal of 82385805978 is 87950858328.

82385805978 is a `hidden beast` number, since 8 + 2 + 38 + 5 + 8 + 0 + 597 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346393 + ... + 533628.

It is an arithmetic number, because the mean of its divisors is an integer number (4255786392).

Almost surely, 2^82385805978 is an apocalyptic number.

82385805978 is an abundant number, since it is smaller than the sum of its proper divisors (121891940838).

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

82385805978 is a wasteful number, since it uses less digits than its factorization.

82385805978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880779 (or 880776 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 82385805978 in words is "eighty-two billion, three hundred eighty-five million, eight hundred five thousand, nine hundred seventy-eight".