1620819370120 has 32 divisors (see below), whose sum is σ = 3649363992000. Its totient is φ = 647879675328.

The previous prime is 1620819370087. The next prime is 1620819370127. The reversal of 1620819370120 is 210739180261.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1620819370127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13943670 + ... + 14059429.

It is an arithmetic number, because the mean of its divisors is an integer number (114042624750).

Almost surely, 2^{1620819370120} is an apocalyptic number.

1620819370120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620819370120 is an abundant number, since it is smaller than the sum of its proper divisors (2028544621880).

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

1620819370120 is a wasteful number, since it uses less digits than its factorization.

1620819370120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28004557 (or 28004553 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 1620819370120 in words is "one trillion, six hundred twenty billion, eight hundred nineteen million, three hundred seventy thousand, one hundred twenty".