1601610115506 has 16 divisors (see below), whose sum is σ = 3203410096800. Its totient is φ = 533838394208.

The previous prime is 1601610115489. The next prime is 1601610115507. The reversal of 1601610115506 is 6055110161061.

It is a super-2 number, since 2×1601610115506² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1601610115507) 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, 7801296 + ... + 8003963.

It is an arithmetic number, because the mean of its divisors is an integer number (200213131050).

Almost surely, 2^{1601610115506} is an apocalyptic number.

1601610115506 is an abundant number, since it is smaller than the sum of its proper divisors (1601799981294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601610115506 is a wasteful number, since it uses less digits than its factorization.

1601610115506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15822153.

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

Adding to 1601610115506 its reverse (6055110161061), we get a palindrome (7656720276567).

The spelling of 1601610115506 in words is "one trillion, six hundred one billion, six hundred ten million, one hundred fifteen thousand, five hundred six".