1604040551 has 2 divisors, whose sum is σ = 1604040552. Its totient is φ = 1604040550.

The previous prime is 1604040541. The next prime is 1604040673. The reversal of 1604040551 is 1550404061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1604040551 - 2²² = 1599846247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1604040551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604040541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802020275 + 802020276.

It is an arithmetic number, because the mean of its divisors is an integer number (802020276).

Almost surely, 2^1604040551 is an apocalyptic number.

1604040551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604040551 is an equidigital number, since it uses as much as digits as its factorization.

1604040551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1604040551 is about 40050.4750408781. The cubic root of 1604040551 is about 1170.5908212334.

The spelling of 1604040551 in words is "one billion, six hundred four million, forty thousand, five hundred fifty-one".