4034861606821 has 4 divisors (see below), whose sum is σ = 4034879108352. Its totient is φ = 4034844105292.

The previous prime is 4034861606813. The next prime is 4034861606873. The reversal of 4034861606821 is 1286061684304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4034861606821 - 2³ = 4034861606813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4034861603821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8400271 + ... + 8867596.

It is an arithmetic number, because the mean of its divisors is an integer number (1008719777088).

Almost surely, 2^{4034861606821} is an apocalyptic number.

It is an amenable number.

4034861606821 is a deficient number, since it is larger than the sum of its proper divisors (17501531).

4034861606821 is a wasteful number, since it uses less digits than its factorization.

4034861606821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17501530.

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 4034861606821 in words is "four trillion, thirty-four billion, eight hundred sixty-one million, six hundred six thousand, eight hundred twenty-one".