1620345464 has 8 divisors (see below), whose sum is σ = 3038147760. Its totient is φ = 810172728.

The previous prime is 1620345439. The next prime is 1620345547. The reversal of 1620345464 is 4645430261.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101271584 + ... + 101271599.

It is an arithmetic number, because the mean of its divisors is an integer number (379768470).

Almost surely, 2^1620345464 is an apocalyptic number.

It is an amenable number.

1620345464 is a deficient number, since it is larger than the sum of its proper divisors (1417802296).

1620345464 is a wasteful number, since it uses less digits than its factorization.

1620345464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202543189 (or 202543185 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 1620345464 is about 40253.5149272706. The cubic root of 1620345464 is about 1174.5437707278.

The spelling of 1620345464 in words is "one billion, six hundred twenty million, three hundred forty-five thousand, four hundred sixty-four".