278740612678 has 32 divisors (see below), whose sum is σ = 480762167040. Its totient is φ = 119873144160.

The previous prime is 278740612649. The next prime is 278740612681. The reversal of 278740612678 is 876216047872.

It is a super-2 number, since 2×278740612678² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 124026 + ... + 756877.

It is an arithmetic number, because the mean of its divisors is an integer number (15023817720).

Almost surely, 2^278740612678 is an apocalyptic number.

278740612678 is a deficient number, since it is larger than the sum of its proper divisors (202021554362).

278740612678 is a wasteful number, since it uses less digits than its factorization.

278740612678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881692.

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 278740612678 in words is "two hundred seventy-eight billion, seven hundred forty million, six hundred twelve thousand, six hundred seventy-eight".