16311198540 has 192 divisors, whose sum is σ = 56340071424. Its totient is φ = 3433577472.

The previous prime is 16311198523. The next prime is 16311198559. The reversal of 16311198540 is 4589111361.

It is a super-2 number, since 2×16311198540² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2546622 + ... + 2553018.

It is an arithmetic number, because the mean of its divisors is an integer number (293437872).

Almost surely, 2^16311198540 is an apocalyptic number.

16311198540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16311198540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28170035712).

16311198540 is an abundant number, since it is smaller than the sum of its proper divisors (40028872884).

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

16311198540 is a wasteful number, since it uses less digits than its factorization.

16311198540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6896 (or 6894 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 16311198540 in words is "sixteen billion, three hundred eleven million, one hundred ninety-eight thousand, five hundred forty".