70531637009 has 2 divisors, whose sum is σ = 70531637010. Its totient is φ = 70531637008.

The previous prime is 70531636943. The next prime is 70531637023. The reversal of 70531637009 is 90073613507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44744094784 + 25787542225 = 211528^2 + 160585^2 .

It is an emirp because it is prime and its reverse (90073613507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70531637009 - 2²⁰ = 70530588433 is a prime.

It is not a weakly prime, because it can be changed into another prime (70531627009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35265818504 + 35265818505.

It is an arithmetic number, because the mean of its divisors is an integer number (35265818505).

Almost surely, 2^70531637009 is an apocalyptic number.

It is an amenable number.

70531637009 is a deficient number, since it is larger than the sum of its proper divisors (1).

70531637009 is an equidigital number, since it uses as much as digits as its factorization.

70531637009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 41.

The spelling of 70531637009 in words is "seventy billion, five hundred thirty-one million, six hundred thirty-seven thousand, nine".