87562000781 has 2 divisors, whose sum is σ = 87562000782. Its totient is φ = 87562000780.

The previous prime is 87562000751. The next prime is 87562000789. The reversal of 87562000781 is 18700026578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84120301225 + 3441699556 = 290035^2 + 58666^2 .

It is a cyclic number.

It is not a de Polignac number, because 87562000781 - 2¹⁴ = 87561984397 is a prime.

It is a super-2 number, since 2×87562000781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87562000789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43781000390 + 43781000391.

It is an arithmetic number, because the mean of its divisors is an integer number (43781000391).

Almost surely, 2^87562000781 is an apocalyptic number.

It is an amenable number.

87562000781 is a deficient number, since it is larger than the sum of its proper divisors (1).

87562000781 is an equidigital number, since it uses as much as digits as its factorization.

87562000781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 87562000781 in words is "eighty-seven billion, five hundred sixty-two million, seven hundred eighty-one", and thus it is an aban number.