81060635590 has 16 divisors (see below), whose sum is σ = 159173611920. Its totient is φ = 29476594720.

The previous prime is 81060635501. The next prime is 81060635633. The reversal of 81060635590 is 9553606018.

It is a congruent number.

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, 368457325 + ... + 368457544.

It is an arithmetic number, because the mean of its divisors is an integer number (9948350745).

Almost surely, 2^81060635590 is an apocalyptic number.

81060635590 is a deficient number, since it is larger than the sum of its proper divisors (78112976330).

81060635590 is a wasteful number, since it uses less digits than its factorization.

81060635590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736914887.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 81060635590 in words is "eighty-one billion, sixty million, six hundred thirty-five thousand, five hundred ninety".