1149578157 has 64 divisors (see below), whose sum is σ = 1979744256. Its totient is φ = 576702720.

The previous prime is 1149578149. The next prime is 1149578173. The reversal of 1149578157 is 7518759411.

It is not a de Polignac number, because 1149578157 - 2³ = 1149578149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149578117) 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, 1399807 + ... + 1400627.

It is an arithmetic number, because the mean of its divisors is an integer number (30933504).

Almost surely, 2^1149578157 is an apocalyptic number.

It is an amenable number.

1149578157 is a deficient number, since it is larger than the sum of its proper divisors (830166099).

1149578157 is a wasteful number, since it uses less digits than its factorization.

1149578157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its digits is 352800, while the sum is 48.

The square root of 1149578157 is about 33905.4296094298. The cubic root of 1149578157 is about 1047.5614330107.

The spelling of 1149578157 in words is "one billion, one hundred forty-nine million, five hundred seventy-eight thousand, one hundred fifty-seven".