278758379325 has 48 divisors (see below), whose sum is σ = 493022194560. Its totient is φ = 138483179520.

The previous prime is 278758379321. The next prime is 278758379371. The reversal of 278758379325 is 523973857872.

It is not a de Polignac number, because 278758379325 - 2² = 278758379321 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278758379321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1003305 + ... + 1250654.

It is an arithmetic number, because the mean of its divisors is an integer number (10271295720).

Almost surely, 2^278758379325 is an apocalyptic number.

278758379325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

278758379325 is a deficient number, since it is larger than the sum of its proper divisors (214263815235).

278758379325 is a wasteful number, since it uses less digits than its factorization.

278758379325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254086 (or 2254081 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 66.

The spelling of 278758379325 in words is "two hundred seventy-eight billion, seven hundred fifty-eight million, three hundred seventy-nine thousand, three hundred twenty-five".