117778451740 has 24 divisors (see below), whose sum is σ = 261883852272. Its totient is φ = 44340122880.

The previous prime is 117778451737. The next prime is 117778451741. The reversal of 117778451740 is 47154877711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117778451741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173203266 + ... + 173203945.

It is an arithmetic number, because the mean of its divisors is an integer number (10911827178).

Almost surely, 2^117778451740 is an apocalyptic number.

117778451740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117778451740 is an abundant number, since it is smaller than the sum of its proper divisors (144105400532).

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

117778451740 is a wasteful number, since it uses less digits than its factorization.

117778451740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346407237 (or 346407235 counting only the distinct ones).

The product of its (nonzero) digits is 1536640, while the sum is 52.

The spelling of 117778451740 in words is "one hundred seventeen billion, seven hundred seventy-eight million, four hundred fifty-one thousand, seven hundred forty".