278980854085 has 8 divisors (see below), whose sum is σ = 334781821440. Its totient is φ = 223181485584.

The previous prime is 278980854083. The next prime is 278980854133. The reversal of 278980854085 is 580458089872.

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

It is a cyclic number.

It is not a de Polignac number, because 278980854085 - 2¹ = 278980854083 is a prime.

It is a super-2 number, since 2×278980854085² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278980854083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25236 + ... + 747394.

It is an arithmetic number, because the mean of its divisors is an integer number (41847727680).

Almost surely, 2^278980854085 is an apocalyptic number.

It is an amenable number.

278980854085 is a deficient number, since it is larger than the sum of its proper divisors (55800967355).

278980854085 is an equidigital number, since it uses as much as digits as its factorization.

278980854085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799427.

The product of its (nonzero) digits is 51609600, while the sum is 64.

The spelling of 278980854085 in words is "two hundred seventy-eight billion, nine hundred eighty million, eight hundred fifty-four thousand, eighty-five".