1657144061 has 2 divisors, whose sum is σ = 1657144062. Its totient is φ = 1657144060.

The previous prime is 1657144051. The next prime is 1657144079. The reversal of 1657144061 is 1604417561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1542525625 + 114618436 = 39275^2 + 10706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1657144061 - 2¹⁴ = 1657127677 is a prime.

It is a super-2 number, since 2×1657144061² = 5492252877815143442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1657144051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828572030 + 828572031.

It is an arithmetic number, because the mean of its divisors is an integer number (828572031).

Almost surely, 2^1657144061 is an apocalyptic number.

It is an amenable number.

1657144061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657144061 is an equidigital number, since it uses as much as digits as its factorization.

1657144061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1657144061 is about 40708.0343544122. The cubic root of 1657144061 is about 1183.3687277826.

The spelling of 1657144061 in words is "one billion, six hundred fifty-seven million, one hundred forty-four thousand, sixty-one".