1620107644440 has 128 divisors (see below), whose sum is σ = 4872985920000. Its totient is φ = 430903861248.

The previous prime is 1620107644369. The next prime is 1620107644451. The reversal of 1620107644440 is 444467010261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227316157 + ... + 227323283.

It is an arithmetic number, because the mean of its divisors is an integer number (38070202500).

Almost surely, 2^{1620107644440} is an apocalyptic number.

1620107644440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620107644440 is an abundant number, since it is smaller than the sum of its proper divisors (3252878275560).

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

1620107644440 is a wasteful number, since it uses less digits than its factorization.

1620107644440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11809 (or 11805 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 1620107644440 in words is "one trillion, six hundred twenty billion, one hundred seven million, six hundred forty-four thousand, four hundred forty".