278358211055 has 16 divisors (see below), whose sum is σ = 358957461600. Its totient is φ = 206459185152.

The previous prime is 278358211049. The next prime is 278358211073. The reversal of 278358211055 is 550112853872.

It is a cyclic number.

It is not a de Polignac number, because 278358211055 - 2⁴ = 278358211039 is a prime.

It is a super-3 number, since 3×278358211055³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24433130 + ... + 24444519.

It is an arithmetic number, because the mean of its divisors is an integer number (22434841350).

Almost surely, 2^278358211055 is an apocalyptic number.

278358211055 is a deficient number, since it is larger than the sum of its proper divisors (80599250545).

278358211055 is a wasteful number, since it uses less digits than its factorization.

278358211055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48877738.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 278358211055 in words is "two hundred seventy-eight billion, three hundred fifty-eight million, two hundred eleven thousand, fifty-five".