81700253350 has 24 divisors (see below), whose sum is σ = 152024051088. Its totient is φ = 32666858400.

The previous prime is 81700253339. The next prime is 81700253359. The reversal of 81700253350 is 5335200718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81700253359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205986 + ... + 453685.

It is an arithmetic number, because the mean of its divisors is an integer number (6334335462).

Almost surely, 2^81700253350 is an apocalyptic number.

81700253350 is a deficient number, since it is larger than the sum of its proper divisors (70323797738).

81700253350 is a wasteful number, since it uses less digits than its factorization.

81700253350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662160 (or 662155 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 81700253350 in words is "eighty-one billion, seven hundred million, two hundred fifty-three thousand, three hundred fifty".