1153663915 has 16 divisors (see below), whose sum is σ = 1443223296. Its totient is φ = 884304000.

The previous prime is 1153663891. The next prime is 1153663919. The reversal of 1153663915 is 5193663511.

It is not a de Polignac number, because 1153663915 - 2⁷ = 1153663787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153663919) 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, 21192 + ... + 52501.

It is an arithmetic number, because the mean of its divisors is an integer number (90201456).

Almost surely, 2^1153663915 is an apocalyptic number.

1153663915 is a deficient number, since it is larger than the sum of its proper divisors (289559381).

1153663915 is a wasteful number, since it uses less digits than its factorization.

1153663915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73830.

The product of its digits is 72900, while the sum is 40.

The square root of 1153663915 is about 33965.6284352285. The cubic root of 1153663915 is about 1048.8010244793.

The spelling of 1153663915 in words is "one billion, one hundred fifty-three million, six hundred sixty-three thousand, nine hundred fifteen".