161020640103510 has 64 divisors (see below), whose sum is σ = 446380213008384. Its totient is φ = 36739112179200.

The previous prime is 161020640103509. The next prime is 161020640103523. The reversal of 161020640103510 is 15301046020161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14351210086 + ... + 14351221305.

It is an arithmetic number, because the mean of its divisors is an integer number (6974690828256).

Almost surely, 2^{161020640103510} is an apocalyptic number.

161020640103510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161020640103510 is an abundant number, since it is smaller than the sum of its proper divisors (285359572904874).

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

161020640103510 is a wasteful number, since it uses less digits than its factorization.

161020640103510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28702431429.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 161020640103510 its reverse (15301046020161), we get a palindrome (176321686123671).

The spelling of 161020640103510 in words is "one hundred sixty-one trillion, twenty billion, six hundred forty million, one hundred three thousand, five hundred ten".