87762643613 has 2 divisors, whose sum is σ = 87762643614. Its totient is φ = 87762643612.

The previous prime is 87762643609. The next prime is 87762643621. The reversal of 87762643613 is 31634626778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87165476644 + 597166969 = 295238^2 + 24437^2 .

It is a cyclic number.

It is not a de Polignac number, because 87762643613 - 2² = 87762643609 is a prime.

It is a super-2 number, since 2×87762643613² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87762643663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43881321806 + 43881321807.

It is an arithmetic number, because the mean of its divisors is an integer number (43881321807).

Almost surely, 2^87762643613 is an apocalyptic number.

It is an amenable number.

87762643613 is a deficient number, since it is larger than the sum of its proper divisors (1).

87762643613 is an equidigital number, since it uses as much as digits as its factorization.

87762643613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 53.

The spelling of 87762643613 in words is "eighty-seven billion, seven hundred sixty-two million, six hundred forty-three thousand, six hundred thirteen".