2187394778294 has 8 divisors (see below), whose sum is σ = 3579373273608. Its totient is φ = 994270353760.

The previous prime is 2187394778279. The next prime is 2187394778347. The reversal of 2187394778294 is 4928774937812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2187394778294² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49713517667 + ... + 49713517710.

It is an arithmetic number, because the mean of its divisors is an integer number (447421659201).

Almost surely, 2^{2187394778294} is an apocalyptic number.

2187394778294 is a deficient number, since it is larger than the sum of its proper divisors (1391978495314).

2187394778294 is a wasteful number, since it uses less digits than its factorization.

2187394778294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99427035390.

The product of its digits is 341397504, while the sum is 71.

The spelling of 2187394778294 in words is "two trillion, one hundred eighty-seven billion, three hundred ninety-four million, seven hundred seventy-eight thousand, two hundred ninety-four".