161509792410 has 96 divisors (see below), whose sum is σ = 443877408000. Its totient is φ = 40631649408.

The previous prime is 161509792399. The next prime is 161509792417. The reversal of 161509792410 is 14297905161.

161509792410 is a `hidden beast` number, since 1 + 61 + 5 + 0 + 97 + 92 + 410 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (161509792417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 211096 + ... + 606284.

It is an arithmetic number, because the mean of its divisors is an integer number (4623723000).

Almost surely, 2^161509792410 is an apocalyptic number.

161509792410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161509792410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221938704000).

161509792410 is an abundant number, since it is smaller than the sum of its proper divisors (282367615590).

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

161509792410 is a wasteful number, since it uses less digits than its factorization.

161509792410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395460 (or 395457 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 161509792410 in words is "one hundred sixty-one billion, five hundred nine million, seven hundred ninety-two thousand, four hundred ten".