1646042053 has 2 divisors, whose sum is σ = 1646042054. Its totient is φ = 1646042052.

The previous prime is 1646042023. The next prime is 1646042077. The reversal of 1646042053 is 3502406461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1643329444 + 2712609 = 40538^2 + 1647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646042053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646042023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823021026 + 823021027.

It is an arithmetic number, because the mean of its divisors is an integer number (823021027).

Almost surely, 2^1646042053 is an apocalyptic number.

It is an amenable number.

1646042053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646042053 is an equidigital number, since it uses as much as digits as its factorization.

1646042053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1646042053 is about 40571.4438121199. The cubic root of 1646042053 is about 1180.7201514695.

The spelling of 1646042053 in words is "one billion, six hundred forty-six million, forty-two thousand, fifty-three".