1620145916 has 48 divisors (see below), whose sum is σ = 2959756800. Its totient is φ = 775438272.

The previous prime is 1620145913. The next prime is 1620145931. The reversal of 1620145916 is 6195410261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620145913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930625 + ... + 1931463.

It is an arithmetic number, because the mean of its divisors is an integer number (61661600).

Almost surely, 2^1620145916 is an apocalyptic number.

It is an amenable number.

1620145916 is a deficient number, since it is larger than the sum of its proper divisors (1339610884).

1620145916 is a wasteful number, since it uses less digits than its factorization.

1620145916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1620145916 is about 40251.0362102642. The cubic root of 1620145916 is about 1174.4955531332.

The spelling of 1620145916 in words is "one billion, six hundred twenty million, one hundred forty-five thousand, nine hundred sixteen".