1121776645 has 16 divisors (see below), whose sum is σ = 1490430528. Its totient is φ = 803658240.

The previous prime is 1121776639. The next prime is 1121776657. The reversal of 1121776645 is 5466771211.

It is not a de Polignac number, because 1121776645 - 2⁵ = 1121776613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121776598 and 1121776607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148524 + ... + 155893.

It is an arithmetic number, because the mean of its divisors is an integer number (93151908).

Almost surely, 2^1121776645 is an apocalyptic number.

It is an amenable number.

1121776645 is a deficient number, since it is larger than the sum of its proper divisors (368653883).

1121776645 is a wasteful number, since it uses less digits than its factorization.

1121776645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304500.

The product of its digits is 70560, while the sum is 40.

The square root of 1121776645 is about 33492.9342548544. The cubic root of 1121776645 is about 1039.0476504309.

The spelling of 1121776645 in words is "one billion, one hundred twenty-one million, seven hundred seventy-six thousand, six hundred forty-five".