1621773004 has 12 divisors (see below), whose sum is σ = 3005050104. Its totient is φ = 763187264.

The previous prime is 1621772963. The next prime is 1621773031. The reversal of 1621773004 is 4003771261.

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, 11924734 + ... + 11924869.

It is an arithmetic number, because the mean of its divisors is an integer number (250420842).

Almost surely, 2^1621773004 is an apocalyptic number.

It is an amenable number.

1621773004 is a deficient number, since it is larger than the sum of its proper divisors (1383277100).

1621773004 is a wasteful number, since it uses less digits than its factorization.

1621773004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23849624 (or 23849622 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 1621773004 is about 40271.2428911748. The cubic root of 1621773004 is about 1174.8885976169. Note that the first 3 decimals are identical.

The spelling of 1621773004 in words is "one billion, six hundred twenty-one million, seven hundred seventy-three thousand, four".