157646009 has 8 divisors (see below), whose sum is σ = 161438400. Its totient is φ = 153884016.

The previous prime is 157646003. The next prime is 157646017. The reversal of 157646009 is 900646751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157646009 - 2⁸ = 157645753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157646003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3074 + ... + 18020.

It is an arithmetic number, because the mean of its divisors is an integer number (20179800).

Almost surely, 2^157646009 is an apocalyptic number.

It is an amenable number.

157646009 is a deficient number, since it is larger than the sum of its proper divisors (3792391).

157646009 is a wasteful number, since it uses less digits than its factorization.

157646009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15199.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 157646009 is about 12555.7161882547. The cubic root of 157646009 is about 540.2079777301.

The spelling of 157646009 in words is "one hundred fifty-seven million, six hundred forty-six thousand, nine".