77012782613 has 8 divisors (see below), whose sum is σ = 84296464056. Its totient is φ = 69923332800.

The previous prime is 77012782607. The next prime is 77012782667. The reversal of 77012782613 is 31628721077.

It can be written as a sum of positive squares in 4 ways, for example, as 796481284 + 76216301329 = 28222^2 + 276073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77012782613 - 2¹² = 77012778517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77012782813) 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 7 ways as a sum of consecutive naturals, for example, 48557078 + ... + 48558663.

It is an arithmetic number, because the mean of its divisors is an integer number (10537058007).

Almost surely, 2^77012782613 is an apocalyptic number.

It is an amenable number.

77012782613 is a deficient number, since it is larger than the sum of its proper divisors (7283681443).

77012782613 is a wasteful number, since it uses less digits than its factorization.

77012782613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97115815.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 77012782613 in words is "seventy-seven billion, twelve million, seven hundred eighty-two thousand, six hundred thirteen".