1605671721474 has 64 divisors (see below), whose sum is σ = 3366380787840. Its totient is φ = 510079265280.

The previous prime is 1605671721413. The next prime is 1605671721503. The reversal of 1605671721474 is 4741271765061.

It is a super-3 number, since 3×1605671721474³ (a number of 38 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2716809 + ... + 3254595.

It is an arithmetic number, because the mean of its divisors is an integer number (52599699810).

Almost surely, 2^{1605671721474} is an apocalyptic number.

1605671721474 is an abundant number, since it is smaller than the sum of its proper divisors (1760709066366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605671721474 is a wasteful number, since it uses less digits than its factorization.

1605671721474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538115.

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 1605671721474 in words is "one trillion, six hundred five billion, six hundred seventy-one million, seven hundred twenty-one thousand, four hundred seventy-four".