1641020051 has 8 divisors (see below), whose sum is σ = 1831836864. Its totient is φ = 1457142120.

The previous prime is 1641020011. The next prime is 1641020057. The reversal of 1641020051 is 1500201461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1641020051 - 2¹⁴ = 1641003667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1641020057) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1734221 + ... + 1735166.

It is an arithmetic number, because the mean of its divisors is an integer number (228979608).

Almost surely, 2^1641020051 is an apocalyptic number.

1641020051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1641020051 is a deficient number, since it is larger than the sum of its proper divisors (190816813).

1641020051 is a wasteful number, since it uses less digits than its factorization.

1641020051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3469441.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1641020051 is about 40509.5056869372. The cubic root of 1641020051 is about 1179.5181531187.

The spelling of 1641020051 in words is "one billion, six hundred forty-one million, twenty thousand, fifty-one".