1604561051 has 2 divisors, whose sum is σ = 1604561052. Its totient is φ = 1604561050.

The previous prime is 1604561011. The next prime is 1604561087. The reversal of 1604561051 is 1501654061.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604561051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1604561011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802280525 + 802280526.

It is an arithmetic number, because the mean of its divisors is an integer number (802280526).

Almost surely, 2^1604561051 is an apocalyptic number.

1604561051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604561051 is an equidigital number, since it uses as much as digits as its factorization.

1604561051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1604561051 is about 40056.9725640868. The cubic root of 1604561051 is about 1170.7174237332.

The spelling of 1604561051 in words is "one billion, six hundred four million, five hundred sixty-one thousand, fifty-one".