11640157 has 4 divisors (see below), whose sum is σ = 11677660. Its totient is φ = 11602656.

The previous prime is 11640151. The next prime is 11640199. The reversal of 11640157 is 75104611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4301476 + 7338681 = 2074^2 + 2709^2 .

It is a cyclic number.

It is not a de Polignac number, because 11640157 - 2¹⁵ = 11607389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18282 + ... + 18907.

It is an arithmetic number, because the mean of its divisors is an integer number (2919415).

Almost surely, 2^11640157 is an apocalyptic number.

It is an amenable number.

11640157 is a deficient number, since it is larger than the sum of its proper divisors (37503).

11640157 is an equidigital number, since it uses as much as digits as its factorization.

11640157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37502.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 11640157 is about 3411.7674305263. The cubic root of 11640157 is about 226.6311552884.

Adding to 11640157 its reverse (75104611), we get a palindrome (86744768).

The spelling of 11640157 in words is "eleven million, six hundred forty thousand, one hundred fifty-seven".