161606601511510 has 64 divisors (see below), whose sum is σ = 306262658257920. Its totient is φ = 61338317863680.

The previous prime is 161606601511493. The next prime is 161606601511513. The reversal of 161606601511510 is 15115106606161.

161606601511510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161606601511510² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606601511513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35064184 + ... + 39404443.

It is an arithmetic number, because the mean of its divisors is an integer number (4785354035280).

Almost surely, 2^{161606601511510} is an apocalyptic number.

161606601511510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161606601511510 is a deficient number, since it is larger than the sum of its proper divisors (144656056746410).

161606601511510 is a wasteful number, since it uses less digits than its factorization.

161606601511510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74468821.

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 161606601511510 in words is "one hundred sixty-one trillion, six hundred six billion, six hundred one million, five hundred eleven thousand, five hundred ten".