1121621546656 has 24 divisors (see below), whose sum is σ = 2378053376244. Its totient is φ = 517671482880.

The previous prime is 1121621546587. The next prime is 1121621546699. The reversal of 1121621546656 is 6566451261211.

It can be written as a sum of positive squares in 2 ways, for example, as 1078515482256 + 43106064400 = 1038516^2 + 207620^2 .

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, 1348102405 + ... + 1348103236.

Almost surely, 2^{1121621546656} is an apocalyptic number.

1121621546656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1121621546656 is an abundant number, since it is smaller than the sum of its proper divisors (1256431829588).

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

1121621546656 is a wasteful number, since it uses less digits than its factorization.

1121621546656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696205664 (or 2696205656 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

It can be divided in two parts, 112162154 and 6656, that multiplied together give a square (746551297024 = 864032²).

The spelling of 1121621546656 in words is "one trillion, one hundred twenty-one billion, six hundred twenty-one million, five hundred forty-six thousand, six hundred fifty-six".