161694061015 has 8 divisors (see below), whose sum is σ = 194539488768. Its totient is φ = 129017505120.

The previous prime is 161694061013. The next prime is 161694061031. The reversal of 161694061015 is 510160496161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161694061015 - 2¹ = 161694061013 is a prime.

It is a super-2 number, since 2×161694061015² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161694061013) 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, 42215856 + ... + 42219685.

It is an arithmetic number, because the mean of its divisors is an integer number (24317436096).

Almost surely, 2^161694061015 is an apocalyptic number.

161694061015 is a deficient number, since it is larger than the sum of its proper divisors (32845427753).

161694061015 is an equidigital number, since it uses as much as digits as its factorization.

161694061015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84435929.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 161694061015 in words is "one hundred sixty-one billion, six hundred ninety-four million, sixty-one thousand, fifteen".