9812809827097 has 16 divisors (see below), whose sum is σ = 10274137587712. Its totient is φ = 9361483709760.

The previous prime is 9812809827089. The next prime is 9812809827241. The reversal of 9812809827097 is 7907289082189.

It is a cyclic number.

It is not a de Polignac number, because 9812809827097 - 2³ = 9812809827089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9812809827077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7319658 + ... + 8555875.

It is an arithmetic number, because the mean of its divisors is an integer number (642133599232).

Almost surely, 2^{9812809827097} is an apocalyptic number.

It is an amenable number.

9812809827097 is a deficient number, since it is larger than the sum of its proper divisors (461327760615).

9812809827097 is a wasteful number, since it uses less digits than its factorization.

9812809827097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15875848.

The product of its (nonzero) digits is 73156608, while the sum is 70.

The spelling of 9812809827097 in words is "nine trillion, eight hundred twelve billion, eight hundred nine million, eight hundred twenty-seven thousand, ninety-seven".