161515505602 has 8 divisors (see below), whose sum is σ = 264298100112. Its totient is φ = 73416138900.

The previous prime is 161515505537. The next prime is 161515505603. The reversal of 161515505602 is 206505515161.

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

It is not an unprimeable number, because it can be changed into a prime (161515505603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3670806924 + ... + 3670806967.

It is an arithmetic number, because the mean of its divisors is an integer number (33037262514).

Almost surely, 2^161515505602 is an apocalyptic number.

161515505602 is a deficient number, since it is larger than the sum of its proper divisors (102782594510).

161515505602 is a wasteful number, since it uses less digits than its factorization.

161515505602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341613904.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 161515505602 in words is "one hundred sixty-one billion, five hundred fifteen million, five hundred five thousand, six hundred two".