1081545540 has 48 divisors (see below), whose sum is σ = 3041945088. Its totient is φ = 287115264.

The previous prime is 1081545539. The next prime is 1081545571. The reversal of 1081545540 is 455451801.

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, 27037 + ... + 53796.

It is an arithmetic number, because the mean of its divisors is an integer number (63373856).

Almost surely, 2^1081545540 is an apocalyptic number.

1081545540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081545540 is an abundant number, since it is smaller than the sum of its proper divisors (1960399548).

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

1081545540 is a wasteful number, since it uses less digits than its factorization.

1081545540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81068 (or 81066 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 1081545540 is about 32886.8596858989. The cubic root of 1081545540 is about 1026.4747488475.

The spelling of 1081545540 in words is "one billion, eighty-one million, five hundred forty-five thousand, five hundred forty".