1620465572 has 12 divisors (see below), whose sum is σ = 3093616176. Its totient is φ = 736575240.

The previous prime is 1620465571. The next prime is 1620465593. The reversal of 1620465572 is 2755640261.

It is not an unprimeable number, because it can be changed into a prime (1620465571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18414338 + ... + 18414425.

It is an arithmetic number, because the mean of its divisors is an integer number (257801348).

Almost surely, 2^1620465572 is an apocalyptic number.

It is an amenable number.

1620465572 is a deficient number, since it is larger than the sum of its proper divisors (1473150604).

1620465572 is a wasteful number, since it uses less digits than its factorization.

1620465572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36828778 (or 36828776 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 1620465572 is about 40255.0067941865. The cubic root of 1620465572 is about 1174.5727910038.

The spelling of 1620465572 in words is "one billion, six hundred twenty million, four hundred sixty-five thousand, five hundred seventy-two".