1148478681 has 16 divisors (see below), whose sum is σ = 1750615424. Its totient is φ = 656066304.

The previous prime is 1148478679. The next prime is 1148478689. The reversal of 1148478681 is 1868748411.

It is not a de Polignac number, because 1148478681 - 2¹ = 1148478679 is a prime.

It is a super-2 number, since 2×1148478681² = 2638006561422999522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1148478681.

It is not an unprimeable number, because it can be changed into a prime (1148478689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81171 + ... + 94263.

It is an arithmetic number, because the mean of its divisors is an integer number (109413464).

Almost surely, 2^1148478681 is an apocalyptic number.

It is an amenable number.

1148478681 is a deficient number, since it is larger than the sum of its proper divisors (602136743).

1148478681 is a wasteful number, since it uses less digits than its factorization.

1148478681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17280.

The product of its digits is 344064, while the sum is 48.

The square root of 1148478681 is about 33889.2118674955. The cubic root of 1148478681 is about 1047.2273579901.

The spelling of 1148478681 in words is "one billion, one hundred forty-eight million, four hundred seventy-eight thousand, six hundred eighty-one".