1641217972 has 24 divisors (see below), whose sum is σ = 2884845600. Its totient is φ = 816986016.

The previous prime is 1641217933. The next prime is 1641217973. The reversal of 1641217972 is 2797121461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641217973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1479354 + ... + 1480462.

It is an arithmetic number, because the mean of its divisors is an integer number (120201900).

Almost surely, 2^1641217972 is an apocalyptic number.

It is an amenable number.

1641217972 is a deficient number, since it is larger than the sum of its proper divisors (1243627628).

1641217972 is a wasteful number, since it uses less digits than its factorization.

1641217972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415 (or 2413 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 1641217972 is about 40511.9485090510. The cubic root of 1641217972 is about 1179.5655711921.

The spelling of 1641217972 in words is "one billion, six hundred forty-one million, two hundred seventeen thousand, nine hundred seventy-two".