81738594260 has 12 divisors (see below), whose sum is σ = 171651047988. Its totient is φ = 32695437696.

The previous prime is 81738594241. The next prime is 81738594271. The reversal of 81738594260 is 6249583718.

It can be written as a sum of positive squares in 2 ways, for example, as 26307542416 + 55431051844 = 162196^2 + 235438^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2043464837 + ... + 2043464876.

It is an arithmetic number, because the mean of its divisors is an integer number (14304253999).

It is a 1-persistent number, because it is pandigital, but 2⋅81738594260 = 163477188520 is not.

Almost surely, 2^81738594260 is an apocalyptic number.

It is an amenable number.

81738594260 is an abundant number, since it is smaller than the sum of its proper divisors (89912453728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81738594260 is a wasteful number, since it uses less digits than its factorization.

81738594260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086929722 (or 4086929720 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 81738594260 in words is "eighty-one billion, seven hundred thirty-eight million, five hundred ninety-four thousand, two hundred sixty".