76540202281 has 9 divisors (see below), whose sum is σ = 80786204823. Its totient is φ = 72506790720.

The previous prime is 76540202279. The next prime is 76540202303. The reversal of 76540202281 is 18220204567.

It is a happy number.

The square root of 76540202281 is 276659.

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

It can be written as a sum of positive squares in only one way, i.e., 68360808681 + 8179393600 = 261459^2 + 90440^2 .

It is not a de Polignac number, because 76540202281 - 2¹ = 76540202279 is a prime.

It is a super-2 number, since 2×76540202281² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76540202281.

It is not an unprimeable number, because it can be changed into a prime (76540202581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5249241 + ... + 5263801.

Almost surely, 2^76540202281 is an apocalyptic number.

76540202281 is the 276659-th square number.

76540202281 is the 138330-th centered octagonal number.

It is an amenable number.

76540202281 is a deficient number, since it is larger than the sum of its proper divisors (4246002542).

76540202281 is an frugal number, since it uses more digits than its factorization.

76540202281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29160 (or 14580 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 76540202281 in words is "seventy-six billion, five hundred forty million, two hundred two thousand, two hundred eighty-one".