1621604414 has 8 divisors (see below), whose sum is σ = 2436469200. Its totient is φ = 809448016.

The previous prime is 1621604371. The next prime is 1621604423. The reversal of 1621604414 is 4144061261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675599 + ... + 677994.

It is an arithmetic number, because the mean of its divisors is an integer number (304558650).

Almost surely, 2^1621604414 is an apocalyptic number.

1621604414 is a deficient number, since it is larger than the sum of its proper divisors (814864786).

1621604414 is a wasteful number, since it uses less digits than its factorization.

1621604414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354194.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1621604414 is about 40269.1496557849. The cubic root of 1621604414 is about 1174.8478846992.

Adding to 1621604414 its reverse (4144061261), we get a palindrome (5765665675).

The spelling of 1621604414 in words is "one billion, six hundred twenty-one million, six hundred four thousand, four hundred fourteen".