16161578822 has 4 divisors (see below), whose sum is σ = 24242368236. Its totient is φ = 8080789410.

The previous prime is 16161578821. The next prime is 16161578831. The reversal of 16161578822 is 22887516161.

16161578822 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×16161578822² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161578821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4040394704 + ... + 4040394707.

It is an arithmetic number, because the mean of its divisors is an integer number (6060592059).

Almost surely, 2^16161578822 is an apocalyptic number.

16161578822 is a deficient number, since it is larger than the sum of its proper divisors (8080789414).

16161578822 is an equidigital number, since it uses as much as digits as its factorization.

16161578822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080789413.

The product of its digits is 322560, while the sum is 47.

The spelling of 16161578822 in words is "sixteen billion, one hundred sixty-one million, five hundred seventy-eight thousand, eight hundred twenty-two".