1657148074 has 4 divisors (see below), whose sum is σ = 2485722114. Its totient is φ = 828574036.

The previous prime is 1657148071. The next prime is 1657148081. The reversal of 1657148074 is 4708417561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4708417561 = 23 ⋅204713807.

It can be written as a sum of positive squares in only one way, i.e., 1250117449 + 407030625 = 35357^2 + 20175^2 .

It is a super-2 number, since 2×1657148074² = 5492279478323818952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1657148074.

It is not an unprimeable number, because it can be changed into a prime (1657148071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414287017 + ... + 414287020.

Almost surely, 2^1657148074 is an apocalyptic number.

1657148074 is a deficient number, since it is larger than the sum of its proper divisors (828574040).

1657148074 is an equidigital number, since it uses as much as digits as its factorization.

1657148074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828574039.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 1657148074 is about 40708.0836444065. The cubic root of 1657148074 is about 1183.3696830113.

The spelling of 1657148074 in words is "one billion, six hundred fifty-seven million, one hundred forty-eight thousand, seventy-four".