117777816 has 96 divisors (see below), whose sum is σ = 355446000. Its totient is φ = 34981632.

The previous prime is 117777811. The next prime is 117777839. The reversal of 117777816 is 618777711.

It is a super-2 number, since 2×117777816² = 27743227883459712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117777811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24975 + ... + 29313.

Almost surely, 2^117777816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117777816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177723000).

117777816 is an abundant number, since it is smaller than the sum of its proper divisors (237668184).

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

117777816 is a wasteful number, since it uses less digits than its factorization.

117777816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393 (or 4386 counting only the distinct ones).

The product of its digits is 115248, while the sum is 45.

The square root of 117777816 is about 10852.5488250457. The cubic root of 117777816 is about 490.1787713651.

The spelling of 117777816 in words is "one hundred seventeen million, seven hundred seventy-seven thousand, eight hundred sixteen".