157643499 has 32 divisors (see below), whose sum is σ = 244823040. Its totient is φ = 89344512.

The previous prime is 157643489. The next prime is 157643503. The reversal of 157643499 is 994346751.

It is not a de Polignac number, because 157643499 - 2⁵ = 157643467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157643419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28632 + ... + 33690.

It is an arithmetic number, because the mean of its divisors is an integer number (7650720).

Almost surely, 2^157643499 is an apocalyptic number.

157643499 is a deficient number, since it is larger than the sum of its proper divisors (87179541).

157643499 is a wasteful number, since it uses less digits than its factorization.

157643499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139.

The product of its digits is 816480, while the sum is 48.

The square root of 157643499 is about 12555.6162333834. The cubic root of 157643499 is about 540.2051106965.

The spelling of 157643499 in words is "one hundred fifty-seven million, six hundred forty-three thousand, four hundred ninety-nine".