16121161650 has 48 divisors (see below), whose sum is σ = 43615074528. Its totient is φ = 3908160000.

The previous prime is 16121161643. The next prime is 16121161673. The reversal of 16121161650 is 5616112161.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4883551 + ... + 4886850.

It is an arithmetic number, because the mean of its divisors is an integer number (908647386).

Almost surely, 2^16121161650 is an apocalyptic number.

16121161650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16121161650 is an abundant number, since it is smaller than the sum of its proper divisors (27493912878).

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

16121161650 is a wasteful number, since it uses less digits than its factorization.

16121161650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9770427 (or 9770422 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

It can be divided in two parts, 16121 and 161650, that added together give a palindrome (177771).

The spelling of 16121161650 in words is "sixteen billion, one hundred twenty-one million, one hundred sixty-one thousand, six hundred fifty".