82861906628 has 12 divisors (see below), whose sum is σ = 145012627452. Its totient is φ = 41429727360.

The previous prime is 82861906627. The next prime is 82861906643. The reversal of 82861906628 is 82660916828.

It can be written as a sum of positive squares in 2 ways, for example, as 69644265604 + 13217641024 = 263902^2 + 114968^2 .

It is not an unprimeable number, because it can be changed into a prime (82861906627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144953 + ... + 432128.

It is an arithmetic number, because the mean of its divisors is an integer number (12084385621).

Almost surely, 2^82861906628 is an apocalyptic number.

It is an amenable number.

82861906628 is a deficient number, since it is larger than the sum of its proper divisors (62150720824).

82861906628 is a wasteful number, since it uses less digits than its factorization.

82861906628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612982 (or 612980 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 82861906628 in words is "eighty-two billion, eight hundred sixty-one million, nine hundred six thousand, six hundred twenty-eight".