278961648080 has 30 divisors (see below), whose sum is σ = 648596815458. Its totient is φ = 111582769600.

The previous prime is 278961647983. The next prime is 278961648101. The reversal of 278961648080 is 80846169872.

It can be written as a sum of positive squares in only one way, i.e., 223169318464 + 55792329616 = 472408^2 + 236204^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4694555 + ... + 4753605.

Almost surely, 2^278961648080 is an apocalyptic number.

278961648080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278961648080 is an abundant number, since it is smaller than the sum of its proper divisors (369635167378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278961648080 is an frugal number, since it uses more digits than its factorization.

278961648080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118115 (or 59058 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 278961648080 in words is "two hundred seventy-eight billion, nine hundred sixty-one million, six hundred forty-eight thousand, eighty".