117781304617387 has 16 divisors (see below), whose sum is σ = 120475431014400. Its totient is φ = 115127617943520.

The previous prime is 117781304617373. The next prime is 117781304617409. The reversal of 117781304617387 is 783716403187711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117781304617387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117781304617087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23153212 + ... + 27778297.

It is an arithmetic number, because the mean of its divisors is an integer number (7529714438400).

Almost surely, 2^{117781304617387} is an apocalyptic number.

117781304617387 is a deficient number, since it is larger than the sum of its proper divisors (2694126397013).

117781304617387 is a wasteful number, since it uses less digits than its factorization.

117781304617387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50931906.

The product of its (nonzero) digits is 33191424, while the sum is 64.

The spelling of 117781304617387 in words is "one hundred seventeen trillion, seven hundred eighty-one billion, three hundred four million, six hundred seventeen thousand, three hundred eighty-seven".