1151535987 has 64 divisors (see below), whose sum is σ = 2075904000. Its totient is φ = 615859200.

The previous prime is 1151535971. The next prime is 1151535989. The reversal of 1151535987 is 7895351511.

1151535987 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 53 + 598 + 7 = 666.

It is not a de Polignac number, because 1151535987 - 2⁴ = 1151535971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151535989) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 638487 + ... + 640287.

It is an arithmetic number, because the mean of its divisors is an integer number (32436000).

Almost surely, 2^1151535987 is an apocalyptic number.

1151535987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1151535987 is a deficient number, since it is larger than the sum of its proper divisors (924368013).

1151535987 is a wasteful number, since it uses less digits than its factorization.

1151535987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 2027 counting only the distinct ones).

The product of its digits is 189000, while the sum is 45.

The square root of 1151535987 is about 33934.2892514342. The cubic root of 1151535987 is about 1048.1557913196.

The spelling of 1151535987 in words is "one billion, one hundred fifty-one million, five hundred thirty-five thousand, nine hundred eighty-seven".