82801077578 has 8 divisors (see below), whose sum is σ = 124213667268. Its totient is φ = 41396521824.

The previous prime is 82801077533. The next prime is 82801077589. The reversal of 82801077578 is 87577010828.

It can be written as a sum of positive squares in 2 ways, for example, as 79977536809 + 2823540769 = 282803^2 + 53137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×82801077578⁴ (a number of 45 digits) contains 4444 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1982651 + ... + 2023982.

Almost surely, 2^82801077578 is an apocalyptic number.

82801077578 is a deficient number, since it is larger than the sum of its proper divisors (41412589690).

82801077578 is a wasteful number, since it uses less digits than its factorization.

82801077578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016968.

The product of its (nonzero) digits is 1756160, while the sum is 53.

The spelling of 82801077578 in words is "eighty-two billion, eight hundred one million, seventy-seven thousand, five hundred seventy-eight".