81086098642 has 16 divisors (see below), whose sum is σ = 122968316160. Its totient is φ = 40097909808.

The previous prime is 81086098609. The next prime is 81086098651. The reversal of 81086098642 is 24689068018.

It is a self number, because there is not a number n which added to its sum of digits gives 81086098642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182217 + ... + 442012.

It is an arithmetic number, because the mean of its divisors is an integer number (7685519760).

Almost surely, 2^81086098642 is an apocalyptic number.

81086098642 is a deficient number, since it is larger than the sum of its proper divisors (41882217518).

81086098642 is a wasteful number, since it uses less digits than its factorization.

81086098642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624945.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 81086098642 in words is "eighty-one billion, eighty-six million, ninety-eight thousand, six hundred forty-two".