8038436629921 has 4 divisors (see below), whose sum is σ = 8041539078144. Its totient is φ = 8035334181700.

The previous prime is 8038436629907. The next prime is 8038436629969. The reversal of 8038436629921 is 1299266348308.

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 8038436629921 - 2⁹ = 8038436629409 is a prime.

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 8038436629921.

It is not an unprimeable number, because it can be changed into a prime (8038436629901) 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, 1551220225 + ... + 1551225406.

It is an arithmetic number, because the mean of its divisors is an integer number (2010384769536).

Almost surely, 2^{8038436629921} is an apocalyptic number.

It is an amenable number.

8038436629921 is a deficient number, since it is larger than the sum of its proper divisors (3102448223).

8038436629921 is a wasteful number, since it uses less digits than its factorization.

8038436629921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102448222.

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 8038436629921 in words is "eight trillion, thirty-eight billion, four hundred thirty-six million, six hundred twenty-nine thousand, nine hundred twenty-one".