76732878049 has 3 divisors (see below), whose sum is σ = 76733155057. Its totient is φ = 76732601042.

The previous prime is 76732878043. The next prime is 76732878059. The reversal of 76732878049 is 94087823767.

The square root of 76732878049 is 277007.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94087823767 = 7 ⋅13441117681.

It is not a de Polignac number, because 76732878049 - 2²¹ = 76730780897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76732878043) by changing a digit.

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 in 2 ways as a sum of consecutive naturals, for example, 138504 + ... + 415510.

Almost surely, 2^76732878049 is an apocalyptic number.

76732878049 is the 277007-th square number.

76732878049 is the 138504-th centered octagonal number.

It is an amenable number.

76732878049 is a deficient number, since it is larger than the sum of its proper divisors (277008).

76732878049 is an frugal number, since it uses more digits than its factorization.

76732878049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554014 (or 277007 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 76732878049 in words is "seventy-six billion, seven hundred thirty-two million, eight hundred seventy-eight thousand, forty-nine".