34155556321 has 4 divisors (see below), whose sum is σ = 35953217200. Its totient is φ = 32357895444.

The previous prime is 34155556313. The next prime is 34155556339. The reversal of 34155556321 is 12365555143.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12365555143 = 2287 ⋅5406889.

It is a cyclic number.

It is not a de Polignac number, because 34155556321 - 2³ = 34155556313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34155356321) 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, 898830411 + ... + 898830448.

It is an arithmetic number, because the mean of its divisors is an integer number (8988304300).

Almost surely, 2^34155556321 is an apocalyptic number.

It is an amenable number.

34155556321 is a deficient number, since it is larger than the sum of its proper divisors (1797660879).

34155556321 is a wasteful number, since it uses less digits than its factorization.

34155556321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797660878.

The product of its digits is 270000, while the sum is 40.

The spelling of 34155556321 in words is "thirty-four billion, one hundred fifty-five million, five hundred fifty-six thousand, three hundred twenty-one".