34538658921 has 24 divisors (see below), whose sum is σ = 53737756800. Its totient is φ = 21250226016.

The previous prime is 34538658881. The next prime is 34538658949. The reversal of 34538658921 is 12985683543.

34538658921 is a `hidden beast` number, since 3 + 4 + 5 + 38 + 6 + 589 + 21 = 666.

It is not a de Polignac number, because 34538658921 - 2²² = 34534464617 is a prime.

It is a super-2 number, since 2×34538658921² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (34538658221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 602880 + ... + 657678.

It is an arithmetic number, because the mean of its divisors is an integer number (2239073200).

Almost surely, 2^34538658921 is an apocalyptic number.

It is an amenable number.

34538658921 is a deficient number, since it is larger than the sum of its proper divisors (19199097879).

34538658921 is a wasteful number, since it uses less digits than its factorization.

34538658921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60205 (or 60202 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 34538658921 in words is "thirty-four billion, five hundred thirty-eight million, six hundred fifty-eight thousand, nine hundred twenty-one".