1145521656000 has 224 divisors, whose sum is σ = 4202792468160. Its totient is φ = 305472384000.

The previous prime is 1145521655909. The next prime is 1145521656007. The reversal of 1145521656000 is 6561255411.

1145521656000 is a `hidden beast` number, since 1 + 1 + 45 + 5 + 2 + 1 + 6 + 5 + 600 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1145521656007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2435671 + ... + 2867670.

Almost surely, 2^{1145521656000} is an apocalyptic number.

1145521656000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145521656000 is an abundant number, since it is smaller than the sum of its proper divisors (3057270812160).

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

1145521656000 is an equidigital number, since it uses as much as digits as its factorization.

1145521656000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303377 (or 5303351 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 1145521656000 in words is "one trillion, one hundred forty-five billion, five hundred twenty-one million, six hundred fifty-six thousand".