1641620056 has 16 divisors (see below), whose sum is σ = 3098424240. Its totient is φ = 815373600.

The previous prime is 1641620047. The next prime is 1641620087. The reversal of 1641620056 is 6500261461.

It is a super-2 number, since 2×1641620056² = 5389832816522886272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678271 + ... + 680686.

It is an arithmetic number, because the mean of its divisors is an integer number (193651515).

Almost surely, 2^1641620056 is an apocalyptic number.

It is an amenable number.

1641620056 is a deficient number, since it is larger than the sum of its proper divisors (1456804184).

1641620056 is a wasteful number, since it uses less digits than its factorization.

1641620056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359114 (or 1359110 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1641620056 is about 40516.9107410721. The cubic root of 1641620056 is about 1179.6618910644.

The spelling of 1641620056 in words is "one billion, six hundred forty-one million, six hundred twenty thousand, fifty-six".