16243511540 has 48 divisors (see below), whose sum is σ = 35932014720. Its totient is φ = 6151098240.

The previous prime is 16243511519. The next prime is 16243511579. The reversal of 16243511540 is 4511534261.

It is a super-2 number, since 2×16243511540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16243511497 and 16243511506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553025 + ... + 581655.

It is an arithmetic number, because the mean of its divisors is an integer number (748583640).

Almost surely, 2^16243511540 is an apocalyptic number.

16243511540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16243511540 is an abundant number, since it is smaller than the sum of its proper divisors (19688503180).

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

16243511540 is a wasteful number, since it uses less digits than its factorization.

16243511540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30152 (or 30150 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 16243511540 in words is "sixteen billion, two hundred forty-three million, five hundred eleven thousand, five hundred forty".