80851387782 has 32 divisors (see below), whose sum is σ = 176422270464. Its totient is φ = 24497748000.

The previous prime is 80851387741. The next prime is 80851387787. The reversal of 80851387782 is 28778315808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80851387787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591603 + ... + 715329.

It is an arithmetic number, because the mean of its divisors is an integer number (5513195952).

Almost surely, 2^80851387782 is an apocalyptic number.

80851387782 is an abundant number, since it is smaller than the sum of its proper divisors (95570882682).

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

80851387782 is a wasteful number, since it uses less digits than its factorization.

80851387782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133644.

The product of its (nonzero) digits is 6021120, while the sum is 57.

The spelling of 80851387782 in words is "eighty billion, eight hundred fifty-one million, three hundred eighty-seven thousand, seven hundred eighty-two".