1601869405 has 16 divisors (see below), whose sum is σ = 1936512000. Its totient is φ = 1272015360.

The previous prime is 1601869397. The next prime is 1601869471. The reversal of 1601869405 is 5049681061.

It is not a de Polignac number, because 1601869405 - 2³ = 1601869397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474925 + ... + 478285.

It is an arithmetic number, because the mean of its divisors is an integer number (121032000).

Almost surely, 2^1601869405 is an apocalyptic number.

It is an amenable number.

1601869405 is a deficient number, since it is larger than the sum of its proper divisors (334642595).

1601869405 is a wasteful number, since it uses less digits than its factorization.

1601869405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1601869405 is about 40023.3607409473. The cubic root of 1601869405 is about 1170.0624324442.

The spelling of 1601869405 in words is "one billion, six hundred one million, eight hundred sixty-nine thousand, four hundred five".