16311878508 has 24 divisors (see below), whose sum is σ = 38123156848. Its totient is φ = 5428420416.

The previous prime is 16311878467. The next prime is 16311878509. The reversal of 16311878508 is 80587811361.

It is not an unprimeable number, because it can be changed into a prime (16311878509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101391 + ... + 1116102.

Almost surely, 2^16311878508 is an apocalyptic number.

It is an amenable number.

16311878508 is an abundant number, since it is smaller than the sum of its proper divisors (21811278340).

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

16311878508 is a wasteful number, since it uses less digits than its factorization.

16311878508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218113 (or 2218111 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 16311878508 in words is "sixteen billion, three hundred eleven million, eight hundred seventy-eight thousand, five hundred eight".