3804518121861 has 8 divisors (see below), whose sum is σ = 5072743214464. Its totient is φ = 2536319221920.

The previous prime is 3804518121851. The next prime is 3804518121871. The reversal of 3804518121861 is 1681218154083.

It is an interprime number because it is at equal distance from previous prime (3804518121851) and next prime (3804518121871).

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

It is not a de Polignac number, because 3804518121861 - 2¹⁴ = 3804518105477 is a prime.

It is a super-2 number, since 2×3804518121861² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3804518121861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3804518121821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6206701 + ... + 6792066.

It is an arithmetic number, because the mean of its divisors is an integer number (634092901808).

Almost surely, 2^{3804518121861} is an apocalyptic number.

It is an amenable number.

3804518121861 is a deficient number, since it is larger than the sum of its proper divisors (1268225092603).

3804518121861 is a wasteful number, since it uses less digits than its factorization.

3804518121861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13096331.

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 3804518121861 in words is "three trillion, eight hundred four billion, five hundred eighteen million, one hundred twenty-one thousand, eight hundred sixty-one".