981781337252 has 6 divisors (see below), whose sum is σ = 1718117340198. Its totient is φ = 490890668624.

The previous prime is 981781337219. The next prime is 981781337279. The reversal of 981781337252 is 252733187189.

It can be written as a sum of positive squares in only one way, i.e., 849040616356 + 132740720896 = 921434^2 + 364336^2 .

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 as a sum of consecutive naturals, namely, 122722667153 + ... + 122722667160.

It is an arithmetic number, because the mean of its divisors is an integer number (286352890033).

Almost surely, 2^981781337252 is an apocalyptic number.

It is an amenable number.

981781337252 is a deficient number, since it is larger than the sum of its proper divisors (736336002946).

981781337252 is a wasteful number, since it uses less digits than its factorization.

981781337252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245445334317 (or 245445334315 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 56.

The spelling of 981781337252 in words is "nine hundred eighty-one billion, seven hundred eighty-one million, three hundred thirty-seven thousand, two hundred fifty-two".