1641247605 has 48 divisors (see below), whose sum is σ = 2948400000. Its totient is φ = 843577728.

The previous prime is 1641247583. The next prime is 1641247631. The reversal of 1641247605 is 5067421461.

1641247605 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 2 + 47 + 605 = 666.

It is not a de Polignac number, because 1641247605 - 2¹⁶ = 1641182069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1641247605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1094146 + ... + 1095644.

It is an arithmetic number, because the mean of its divisors is an integer number (61425000).

Almost surely, 2^1641247605 is an apocalyptic number.

1641247605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641247605 is a deficient number, since it is larger than the sum of its proper divisors (1307152395).

1641247605 is a wasteful number, since it uses less digits than its factorization.

1641247605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1641247605 is about 40512.3142390064. The cubic root of 1641247605 is about 1179.5726703621.

The spelling of 1641247605 in words is "one billion, six hundred forty-one million, two hundred forty-seven thousand, six hundred five".