161651106001 has 16 divisors (see below), whose sum is σ = 208488666240. Its totient is φ = 121618385280.

The previous prime is 161651105989. The next prime is 161651106037. The reversal of 161651106001 is 100601156161.

It is not a de Polignac number, because 161651106001 - 2¹³ = 161651097809 is a prime.

It is a super-2 number, since 2×161651106001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161651106041) 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, 36193716 + ... + 36198181.

It is an arithmetic number, because the mean of its divisors is an integer number (13030541640).

Almost surely, 2^161651106001 is an apocalyptic number.

161651106001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161651106001 is a deficient number, since it is larger than the sum of its proper divisors (46837560239).

161651106001 is a wasteful number, since it uses less digits than its factorization.

161651106001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72391944.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 161651106001 in words is "one hundred sixty-one billion, six hundred fifty-one million, one hundred six thousand, one".