1640574101 has 2 divisors, whose sum is σ = 1640574102. Its totient is φ = 1640574100.

The previous prime is 1640574073. The next prime is 1640574121. The reversal of 1640574101 is 1014750461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896703025 + 743871076 = 29945^2 + 27274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640574101 - 2⁶ = 1640574037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640574121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820287050 + 820287051.

It is an arithmetic number, because the mean of its divisors is an integer number (820287051).

Almost surely, 2^1640574101 is an apocalyptic number.

It is an amenable number.

1640574101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640574101 is an equidigital number, since it uses as much as digits as its factorization.

1640574101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1640574101 is about 40504.0010492791. The cubic root of 1640574101 is about 1179.4112980816.

The spelling of 1640574101 in words is "one billion, six hundred forty million, five hundred seventy-four thousand, one hundred one".