81298649314 has 4 divisors (see below), whose sum is σ = 121947973974. Its totient is φ = 40649324656.

The previous prime is 81298649167. The next prime is 81298649459. The reversal of 81298649314 is 41394689218.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79110000225 + 2188649089 = 281265^2 + 46783^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20324662327 + ... + 20324662330.

Almost surely, 2^81298649314 is an apocalyptic number.

81298649314 is a deficient number, since it is larger than the sum of its proper divisors (40649324660).

81298649314 is a wasteful number, since it uses less digits than its factorization.

81298649314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40649324659.

The product of its digits is 2985984, while the sum is 55.

The spelling of 81298649314 in words is "eighty-one billion, two hundred ninety-eight million, six hundred forty-nine thousand, three hundred fourteen".