78031976612041 has 3 divisors (see below), whose sum is σ = 78031985445613. Its totient is φ = 78031967778470.

The previous prime is 78031976612027. The next prime is 78031976612053. The reversal of 78031976612041 is 14021667913087.

The square root of 78031976612041 is 8833571.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 78031976612041 - 2¹³ = 78031976603849 is a prime.

It is a super-2 number, since 2×78031976612041² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78031976612341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4416786 + ... + 13250356.

Almost surely, 2^{78031976612041} is an apocalyptic number.

78031976612041 is the 8833571-st square number.

78031976612041 is the 4416786-th centered octagonal number.

It is an amenable number.

78031976612041 is a deficient number, since it is larger than the sum of its proper divisors (8833572).

78031976612041 is an frugal number, since it uses more digits than its factorization.

78031976612041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17667142 (or 8833571 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 78031976612041 in words is "seventy-eight trillion, thirty-one billion, nine hundred seventy-six million, six hundred twelve thousand, forty-one".