161551571702 has 16 divisors (see below), whose sum is σ = 243038257920. Its totient is φ = 80538886248.

The previous prime is 161551571663. The next prime is 161551571707. The reversal of 161551571702 is 207175155161.

It is a self number, because there is not a number n which added to its sum of digits gives 161551571702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161551571707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6785423 + ... + 6809189.

It is an arithmetic number, because the mean of its divisors is an integer number (15189891120).

Almost surely, 2^161551571702 is an apocalyptic number.

161551571702 is a deficient number, since it is larger than the sum of its proper divisors (81486686218).

161551571702 is a wasteful number, since it uses less digits than its factorization.

161551571702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33595.

The product of its (nonzero) digits is 73500, while the sum is 41.

The spelling of 161551571702 in words is "one hundred sixty-one billion, five hundred fifty-one million, five hundred seventy-one thousand, seven hundred two".