1641022646 has 4 divisors (see below), whose sum is σ = 2461533972. Its totient is φ = 820511322.

The previous prime is 1641022639. The next prime is 1641022657. The reversal of 1641022646 is 6462201461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6462201461 = 32063 ⋅201547.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410255660 + ... + 410255663.

It is an arithmetic number, because the mean of its divisors is an integer number (615383493).

Almost surely, 2^1641022646 is an apocalyptic number.

1641022646 is a deficient number, since it is larger than the sum of its proper divisors (820511326).

1641022646 is an equidigital number, since it uses as much as digits as its factorization.

1641022646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820511325.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1641022646 is about 40509.5377164440. The cubic root of 1641022646 is about 1179.5187748555.

The spelling of 1641022646 in words is "one billion, six hundred forty-one million, twenty-two thousand, six hundred forty-six".