1123656153520 has 20 divisors (see below), whose sum is σ = 2612500557120. Its totient is φ = 449462461376.

The previous prime is 1123656153461. The next prime is 1123656153563. The reversal of 1123656153520 is 253516563211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

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

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 3 ways as a sum of consecutive naturals, for example, 7022850880 + ... + 7022851039.

It is an arithmetic number, because the mean of its divisors is an integer number (130625027856).

Almost surely, 2^{1123656153520} is an apocalyptic number.

1123656153520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123656153520 is an abundant number, since it is smaller than the sum of its proper divisors (1488844403600).

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

1123656153520 is a wasteful number, since it uses less digits than its factorization.

1123656153520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14045701932 (or 14045701926 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 1123656153520 in words is "one trillion, one hundred twenty-three billion, six hundred fifty-six million, one hundred fifty-three thousand, five hundred twenty".