1620642603 has 8 divisors (see below), whose sum is σ = 2162691216. Its totient is φ = 1079511200.

The previous prime is 1620642599. The next prime is 1620642607. The reversal of 1620642603 is 3062460261.

It is an interprime number because it is at equal distance from previous prime (1620642599) and next prime (1620642607).

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

It is a cyclic number.

It is not a de Polignac number, because 1620642603 - 2² = 1620642599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620642607) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 225168 + ... + 232253.

It is an arithmetic number, because the mean of its divisors is an integer number (270336402).

Almost surely, 2^1620642603 is an apocalyptic number.

1620642603 is a deficient number, since it is larger than the sum of its proper divisors (542048613).

1620642603 is a wasteful number, since it uses less digits than its factorization.

1620642603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458605.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1620642603 is about 40257.2056034693. The cubic root of 1620642603 is about 1174.6155622970.

The spelling of 1620642603 in words is "one billion, six hundred twenty million, six hundred forty-two thousand, six hundred three".