161610160551 has 16 divisors (see below), whose sum is σ = 246972804864. Its totient is φ = 92082524544.

The previous prime is 161610160541. The next prime is 161610160559. The reversal of 161610160551 is 155061016161.

It is not a de Polignac number, because 161610160551 - 2⁵ = 161610160519 is a prime.

It is a super-2 number, since 2×161610160551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161610160559) 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, 11081650 + ... + 11096223.

It is an arithmetic number, because the mean of its divisors is an integer number (15435800304).

Almost surely, 2^161610160551 is an apocalyptic number.

161610160551 is a deficient number, since it is larger than the sum of its proper divisors (85362644313).

161610160551 is a wasteful number, since it uses less digits than its factorization.

161610160551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22178230.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 161610160551 in words is "one hundred sixty-one billion, six hundred ten million, one hundred sixty thousand, five hundred fifty-one".