1620318654 has 48 divisors (see below), whose sum is σ = 3854895408. Its totient is φ = 508332672.

The previous prime is 1620318649. The next prime is 1620318673. The reversal of 1620318654 is 4568130261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89797 + ... + 106320.

It is an arithmetic number, because the mean of its divisors is an integer number (80310321).

Almost surely, 2^1620318654 is an apocalyptic number.

1620318654 is an abundant number, since it is smaller than the sum of its proper divisors (2234576754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620318654 is a wasteful number, since it uses less digits than its factorization.

1620318654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196151 (or 196139 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1620318654 is about 40253.1819114961. The cubic root of 1620318654 is about 1174.5372927487.

The spelling of 1620318654 in words is "one billion, six hundred twenty million, three hundred eighteen thousand, six hundred fifty-four".