157716645 has 32 divisors (see below), whose sum is σ = 262120320. Its totient is φ = 80881920.

The previous prime is 157716577. The next prime is 157716673. The reversal of 157716645 is 546617751.

It is not a de Polignac number, because 157716645 - 2¹² = 157712549 is a prime.

It is a super-2 number, since 2×157716645² = 49749080220112050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 157716597 and 157716606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132955 + ... + 134135.

It is an arithmetic number, because the mean of its divisors is an integer number (8191260).

Almost surely, 2^157716645 is an apocalyptic number.

157716645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157716645 is a deficient number, since it is larger than the sum of its proper divisors (104403675).

157716645 is a wasteful number, since it uses less digits than its factorization.

157716645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525.

The product of its digits is 176400, while the sum is 42.

The square root of 157716645 is about 12558.5287752985. The cubic root of 157716645 is about 540.2886488346.

The spelling of 157716645 in words is "one hundred fifty-seven million, seven hundred sixteen thousand, six hundred forty-five".