16121171568 has 40 divisors (see below), whose sum is σ = 41661829008. Its totient is φ = 5371727872.

The previous prime is 16121171533. The next prime is 16121171603. The reversal of 16121171568 is 86517112161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16121171533) and next prime (16121171603).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71146 + ... + 193142.

Almost surely, 2^16121171568 is an apocalyptic number.

It is an amenable number.

16121171568 is an abundant number, since it is smaller than the sum of its proper divisors (25540657440).

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

16121171568 is a wasteful number, since it uses less digits than its factorization.

16121171568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124761 (or 124755 counting only the distinct ones).

The product of its digits is 20160, while the sum is 39.

The spelling of 16121171568 in words is "sixteen billion, one hundred twenty-one million, one hundred seventy-one thousand, five hundred sixty-eight".