1656169998 has 64 divisors (see below), whose sum is σ = 4041031680. Its totient is φ = 441957600.

The previous prime is 1656169997. The next prime is 1656170003. The reversal of 1656169998 is 8999616561.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656169997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42043 + ... + 71273.

It is an arithmetic number, because the mean of its divisors is an integer number (63141120).

Almost surely, 2^1656169998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656169998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020515840).

1656169998 is an abundant number, since it is smaller than the sum of its proper divisors (2384861682).

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

1656169998 is a wasteful number, since it uses less digits than its factorization.

1656169998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29333.

The product of its digits is 6298560, while the sum is 60.

The square root of 1656169998 is about 40696.0685816210. The cubic root of 1656169998 is about 1183.1368224542.

The spelling of 1656169998 in words is "one billion, six hundred fifty-six million, one hundred sixty-nine thousand, nine hundred ninety-eight".