151728657 has 4 divisors (see below), whose sum is σ = 202304880. Its totient is φ = 101152436.

The previous prime is 151728649. The next prime is 151728671. The reversal of 151728657 is 756827151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756827151 = 3 ⋅252275717.

It is a cyclic number.

It is not a de Polignac number, because 151728657 - 2³ = 151728649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151728257) 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, 25288107 + ... + 25288112.

It is an arithmetic number, because the mean of its divisors is an integer number (50576220).

Almost surely, 2^151728657 is an apocalyptic number.

It is an amenable number.

151728657 is a deficient number, since it is larger than the sum of its proper divisors (50576223).

151728657 is an equidigital number, since it uses as much as digits as its factorization.

151728657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50576222.

The product of its digits is 117600, while the sum is 42.

The square root of 151728657 is about 12317.8186786460. The cubic root of 151728657 is about 533.3625738743.

The spelling of 151728657 in words is "one hundred fifty-one million, seven hundred twenty-eight thousand, six hundred fifty-seven".