1641619056 has 160 divisors (see below), whose sum is σ = 5303517696. Its totient is φ = 425088000.

The previous prime is 1641619027. The next prime is 1641619081. The reversal of 1641619056 is 6509161461.

It is a super-2 number, since 2×1641619056² = 5389826250044662272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1999126 + ... + 1999946.

Almost surely, 2^1641619056 is an apocalyptic number.

1641619056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641619056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2651758848).

1641619056 is an abundant number, since it is smaller than the sum of its proper divisors (3661898640).

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

1641619056 is a wasteful number, since it uses less digits than its factorization.

1641619056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391 (or 1385 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1641619056 is about 40516.8984005439. The cubic root of 1641619056 is about 1179.6616515323.

The spelling of 1641619056 in words is "one billion, six hundred forty-one million, six hundred nineteen thousand, fifty-six".