1151645540 has 12 divisors (see below), whose sum is σ = 2418455676. Its totient is φ = 460658208.

The previous prime is 1151645519. The next prime is 1151645543. The reversal of 1151645540 is 455461511.

It can be written as a sum of positive squares in 2 ways, for example, as 283518244 + 868127296 = 16838^2 + 29464^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1151645497 and 1151645506.

It is not an unprimeable number, because it can be changed into a prime (1151645543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28791119 + ... + 28791158.

It is an arithmetic number, because the mean of its divisors is an integer number (201537973).

Almost surely, 2^1151645540 is an apocalyptic number.

1151645540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151645540 is an abundant number, since it is smaller than the sum of its proper divisors (1266810136).

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

1151645540 is a wasteful number, since it uses less digits than its factorization.

1151645540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57582286 (or 57582284 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1151645540 is about 33935.9034062746. The cubic root of 1151645540 is about 1048.1890295253.

The spelling of 1151645540 in words is "one billion, one hundred fifty-one million, six hundred forty-five thousand, five hundred forty".