70487336509 has 2 divisors, whose sum is σ = 70487336510. Its totient is φ = 70487336508.

The previous prime is 70487336483. The next prime is 70487336597. The reversal of 70487336509 is 90563378407.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56931391609 + 13555944900 = 238603^2 + 116430^2 .

It is an emirp because it is prime and its reverse (90563378407) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70487336509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70487336609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35243668254 + 35243668255.

It is an arithmetic number, because the mean of its divisors is an integer number (35243668255).

Almost surely, 2^70487336509 is an apocalyptic number.

It is an amenable number.

70487336509 is a deficient number, since it is larger than the sum of its proper divisors (1).

70487336509 is an equidigital number, since it uses as much as digits as its factorization.

70487336509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 70487336509 in words is "seventy billion, four hundred eighty-seven million, three hundred thirty-six thousand, five hundred nine".