70531831009809 has 96 divisors (see below), whose sum is σ = 113274184383360. Its totient is φ = 42015596313600.

The previous prime is 70531831009799. The next prime is 70531831009847. The reversal of 70531831009809 is 90890013813507.

70531831009809 is a `hidden beast` number, since 7 + 0 + 5 + 318 + 310 + 0 + 9 + 8 + 0 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-70531831009809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70531831009889) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 501475107 + ... + 501615735.

It is an arithmetic number, because the mean of its divisors is an integer number (1179939420660).

Almost surely, 2^{70531831009809} is an apocalyptic number.

It is an amenable number.

70531831009809 is a deficient number, since it is larger than the sum of its proper divisors (42742353373551).

70531831009809 is a wasteful number, since it uses less digits than its factorization.

70531831009809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141583 (or 141580 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 70531831009809 in words is "seventy trillion, five hundred thirty-one billion, eight hundred thirty-one million, nine thousand, eight hundred nine".