1641671405 has 16 divisors (see below), whose sum is σ = 2152954944. Its totient is φ = 1191799680.

The previous prime is 1641671399. The next prime is 1641671417. The reversal of 1641671405 is 5041761461.

It is not a de Polignac number, because 1641671405 - 2¹² = 1641667309 is a prime.

It is a super-3 number, since 3×1641671405³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4457 + ... + 57473.

It is an arithmetic number, because the mean of its divisors is an integer number (134559684).

Almost surely, 2^1641671405 is an apocalyptic number.

It is an amenable number.

1641671405 is a deficient number, since it is larger than the sum of its proper divisors (511283539).

1641671405 is a wasteful number, since it uses less digits than its factorization.

1641671405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53596.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1641671405 is about 40517.5444097986. The cubic root of 1641671405 is about 1179.6741906678.

The spelling of 1641671405 in words is "one billion, six hundred forty-one million, six hundred seventy-one thousand, four hundred five".