1148781865 has 48 divisors (see below), whose sum is σ = 1738388736. Its totient is φ = 713370240.

The previous prime is 1148781859. The next prime is 1148781899. The reversal of 1148781865 is 5681878411.

It is not a de Polignac number, because 1148781865 - 2¹³ = 1148773673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2062167 + ... + 2062723.

It is an arithmetic number, because the mean of its divisors is an integer number (36216432).

Almost surely, 2^1148781865 is an apocalyptic number.

It is an amenable number.

1148781865 is a deficient number, since it is larger than the sum of its proper divisors (589606871).

1148781865 is a wasteful number, since it uses less digits than its factorization.

1148781865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1067 counting only the distinct ones).

The product of its digits is 430080, while the sum is 49.

The square root of 1148781865 is about 33893.6847362455. The cubic root of 1148781865 is about 1047.3195015215.

The spelling of 1148781865 in words is "one billion, one hundred forty-eight million, seven hundred eighty-one thousand, eight hundred sixty-five".