1145078161920 has 2880 divisors, whose sum is σ = 5553968808960. Its totient is φ = 214592716800.

The previous prime is 1145078161919. The next prime is 1145078161933. The reversal of 1145078161920 is 291618705411.

1145078161920 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 0 + 7 + 8 + 1 + 619 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (2880).

It is a super-2 number, since 2×1145078161920² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 5426910615 + ... + 5426910825.

It is an arithmetic number, because the mean of its divisors is an integer number (1928461392).

Almost surely, 2^{1145078161920} is an apocalyptic number.

1145078161920 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 1145078161920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2776984404480).

1145078161920 is an abundant number, since it is smaller than the sum of its proper divisors (4408890647040).

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

1145078161920 is a wasteful number, since it uses less digits than its factorization.

1145078161920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 1145078161920 in words is "one trillion, one hundred forty-five billion, seventy-eight million, one hundred sixty-one thousand, nine hundred twenty".