16634423540 has 48 divisors (see below), whose sum is σ = 40037784192. Its totient is φ = 5686778496.

The previous prime is 16634423513. The next prime is 16634423543. The reversal of 16634423540 is 4532443661.

It is a super-2 number, since 2×16634423540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16634423494 and 16634423503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16634423543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122627 + ... + 219786.

It is an arithmetic number, because the mean of its divisors is an integer number (834120504).

Almost surely, 2^16634423540 is an apocalyptic number.

16634423540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16634423540 is an abundant number, since it is smaller than the sum of its proper divisors (23403360652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16634423540 is a wasteful number, since it uses less digits than its factorization.

16634423540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342776 (or 342774 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 16634423540 in words is "sixteen billion, six hundred thirty-four million, four hundred twenty-three thousand, five hundred forty".