1640470141 has 2 divisors, whose sum is σ = 1640470142. Its totient is φ = 1640470140.

The previous prime is 1640470087. The next prime is 1640470171. The reversal of 1640470141 is 1410740461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1564518916 + 75951225 = 39554^2 + 8715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640470141 - 2¹⁷ = 1640339069 is a prime.

It is a super-2 number, since 2×1640470141² = 5382284567025119762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640470171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820235070 + 820235071.

It is an arithmetic number, because the mean of its divisors is an integer number (820235071).

Almost surely, 2^1640470141 is an apocalyptic number.

It is an amenable number.

1640470141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640470141 is an equidigital number, since it uses as much as digits as its factorization.

1640470141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1640470141 is about 40502.7176989397. The cubic root of 1640470141 is about 1179.3863852196.

The spelling of 1640470141 in words is "one billion, six hundred forty million, four hundred seventy thousand, one hundred forty-one".