1620596649820 has 48 divisors (see below), whose sum is σ = 3414238027200. Its totient is φ = 646149394944.

The previous prime is 1620596649799. The next prime is 1620596649827. The reversal of 1620596649820 is 289466950261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620596649827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8250106 + ... + 8444254.

It is an arithmetic number, because the mean of its divisors is an integer number (71129958900).

Almost surely, 2^{1620596649820} is an apocalyptic number.

1620596649820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620596649820 is an abundant number, since it is smaller than the sum of its proper divisors (1793641377380).

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

1620596649820 is a wasteful number, since it uses less digits than its factorization.

1620596649820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195502 (or 195500 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 1620596649820 in words is "one trillion, six hundred twenty billion, five hundred ninety-six million, six hundred forty-nine thousand, eight hundred twenty".