2161571797035 has 128 divisors (see below), whose sum is σ = 4545419673600. Its totient is φ = 953743351680.

The previous prime is 2161571797013. The next prime is 2161571797057. The reversal of 2161571797035 is 5307971751612.

2161571797035 is a `hidden beast` number, since 2 + 1 + 61 + 571 + 7 + 9 + 7 + 0 + 3 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2161571797013) and next prime (2161571797057).

It is not a de Polignac number, because 2161571797035 - 2⁵ = 2161571797003 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11005462 + ... + 11200148.

It is an arithmetic number, because the mean of its divisors is an integer number (35511091200).

Almost surely, 2^{2161571797035} is an apocalyptic number.

2161571797035 is an abundant number, since it is smaller than the sum of its proper divisors (2383847876565).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161571797035 is a wasteful number, since it uses less digits than its factorization.

2161571797035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195118 (or 195112 counting only the distinct ones).

The product of its (nonzero) digits is 2778300, while the sum is 54.

The spelling of 2161571797035 in words is "two trillion, one hundred sixty-one billion, five hundred seventy-one million, seven hundred ninety-seven thousand, thirty-five".