278055555 has 16 divisors (see below), whose sum is σ = 456913824. Its totient is φ = 144288000.

The previous prime is 278055551. The next prime is 278055559. The reversal of 278055555 is 555550872.

It is an interprime number because it is at equal distance from previous prime (278055551) and next prime (278055559).

It is not a de Polignac number, because 278055555 - 2² = 278055551 is a prime.

278055555 is a modest number, since divided by 55555 gives 2780 as remainder.

It is not an unprimeable number, because it can be changed into a prime (278055551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249946 + ... + 251055.

It is an arithmetic number, because the mean of its divisors is an integer number (28557114).

Almost surely, 2^278055555 is an apocalyptic number.

278055555 is a deficient number, since it is larger than the sum of its proper divisors (178858269).

278055555 is a wasteful number, since it uses less digits than its factorization.

278055555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501046.

The product of its (nonzero) digits is 350000, while the sum is 42.

The square root of 278055555 is about 16674.9979010493. The cubic root of 278055555 is about 652.6953599495.

The spelling of 278055555 in words is "two hundred seventy-eight million, fifty-five thousand, five hundred fifty-five".