70520515987 has 2 divisors, whose sum is σ = 70520515988. Its totient is φ = 70520515986.

The previous prime is 70520515963. The next prime is 70520516021. The reversal of 70520515987 is 78951502507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70520515987 - 2¹⁵ = 70520483219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70520515987.

It is not a weakly prime, because it can be changed into another prime (70520519987) 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 as a sum of consecutive naturals, namely, 35260257993 + 35260257994.

It is an arithmetic number, because the mean of its divisors is an integer number (35260257994).

Almost surely, 2^70520515987 is an apocalyptic number.

70520515987 is a deficient number, since it is larger than the sum of its proper divisors (1).

70520515987 is an equidigital number, since it uses as much as digits as its factorization.

70520515987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882000, while the sum is 49.

The spelling of 70520515987 in words is "seventy billion, five hundred twenty million, five hundred fifteen thousand, nine hundred eighty-seven".