82640440821314 has 4 divisors (see below), whose sum is σ = 123960661231974. Its totient is φ = 41320220410656.

The previous prime is 82640440821313. The next prime is 82640440821343. The reversal of 82640440821314 is 41312804404628.

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., 80303410121089 + 2337030700225 = 8961217^2 + 1528735^2 .

It is a super-2 number, since 2×82640440821314² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82640440821313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20660110205327 + ... + 20660110205330.

Almost surely, 2^{82640440821314} is an apocalyptic number.

82640440821314 is a deficient number, since it is larger than the sum of its proper divisors (41320220410660).

82640440821314 is a wasteful number, since it uses less digits than its factorization.

82640440821314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41320220410659.

The product of its (nonzero) digits is 1179648, while the sum is 47.

The spelling of 82640440821314 in words is "eighty-two trillion, six hundred forty billion, four hundred forty million, eight hundred twenty-one thousand, three hundred fourteen".