1545596881920 has 1408 divisors, whose sum is σ = 6809691033600. Its totient is φ = 325655396352.

The previous prime is 1545596881889. The next prime is 1545596881951. The reversal of 1545596881920 is 291886955451.

1545596881920 is a `hidden beast` number, since 1 + 5 + 4 + 5 + 596 + 8 + 8 + 19 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1545596881889) and next prime (1545596881951).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 2125992597 + ... + 2125993323.

Almost surely, 2^{1545596881920} is an apocalyptic number.

1545596881920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1545596881920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3404845516800).

1545596881920 is an abundant number, since it is smaller than the sum of its proper divisors (5264094151680).

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

1545596881920 is an equidigital number, since it uses as much as digits as its factorization.

1545596881920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 63.

The spelling of 1545596881920 in words is "one trillion, five hundred forty-five billion, five hundred ninety-six million, eight hundred eighty-one thousand, nine hundred twenty".