1641797412 has 12 divisors (see below), whose sum is σ = 3830860656. Its totient is φ = 547265800.

The previous prime is 1641797393. The next prime is 1641797419. The reversal of 1641797412 is 2147971461.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×1641797412³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1641797419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68408214 + ... + 68408237.

It is an arithmetic number, because the mean of its divisors is an integer number (319238388).

Almost surely, 2^1641797412 is an apocalyptic number.

1641797412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1641797412 is an abundant number, since it is smaller than the sum of its proper divisors (2189063244).

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

1641797412 is a wasteful number, since it uses less digits than its factorization.

1641797412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136816458 (or 136816456 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 1641797412 is about 40519.0993483320. The cubic root of 1641797412 is about 1179.7043719823.

The spelling of 1641797412 in words is "one billion, six hundred forty-one million, seven hundred ninety-seven thousand, four hundred twelve".