81883257070 has 16 divisors (see below), whose sum is σ = 147481952688. Its totient is φ = 32732838400.

The previous prime is 81883257041. The next prime is 81883257101. The reversal of 81883257070 is 7075238818.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2541244 + ... + 2573263.

It is an arithmetic number, because the mean of its divisors is an integer number (9217622043).

Almost surely, 2^81883257070 is an apocalyptic number.

81883257070 is a deficient number, since it is larger than the sum of its proper divisors (65598695618).

81883257070 is a wasteful number, since it uses less digits than its factorization.

81883257070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116115.

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 81883257070 in words is "eighty-one billion, eight hundred eighty-three million, two hundred fifty-seven thousand, seventy".