1657450149 has 4 divisors (see below), whose sum is σ = 2209933536. Its totient is φ = 1104966764.

The previous prime is 1657450129. The next prime is 1657450153. The reversal of 1657450149 is 9410547561.

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.

It is a cyclic number.

It is not a de Polignac number, because 1657450149 - 2⁹ = 1657449637 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1657450149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1657450129) 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, 276241689 + ... + 276241694.

It is an arithmetic number, because the mean of its divisors is an integer number (552483384).

Almost surely, 2^1657450149 is an apocalyptic number.

It is an amenable number.

1657450149 is a deficient number, since it is larger than the sum of its proper divisors (552483387).

1657450149 is an equidigital number, since it uses as much as digits as its factorization.

1657450149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552483386.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1657450149 is about 40711.7937335117. The cubic root of 1657450149 is about 1183.4415825767.

The spelling of 1657450149 in words is "one billion, six hundred fifty-seven million, four hundred fifty thousand, one hundred forty-nine".