2317781828778 has 16 divisors (see below), whose sum is σ = 4992145477536. Its totient is φ = 713163639600.

The previous prime is 2317781828767. The next prime is 2317781828837. The reversal of 2317781828778 is 8778281877132.

It is a super-2 number, since 2×2317781828778² (a number of 26 digits) contains 22 as substring.

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, 14857575748 + ... + 14857575903.

It is an arithmetic number, because the mean of its divisors is an integer number (312009092346).

Almost surely, 2^{2317781828778} is an apocalyptic number.

2317781828778 is an abundant number, since it is smaller than the sum of its proper divisors (2674363648758).

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

2317781828778 is a wasteful number, since it uses less digits than its factorization.

2317781828778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29715151669.

The product of its digits is 118013952, while the sum is 69.

The spelling of 2317781828778 in words is "two trillion, three hundred seventeen billion, seven hundred eighty-one million, eight hundred twenty-eight thousand, seven hundred seventy-eight".