278996723993 has 8 divisors (see below), whose sum is σ = 300548474688. Its totient is φ = 257457896784.

The previous prime is 278996723987. The next prime is 278996724043. The reversal of 278996723993 is 399327699872.

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 278996723993 - 2⁸ = 278996723737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 278996723993.

It is not an unprimeable number, because it can be changed into a prime (278996723953) 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, 3186005 + ... + 3272402.

It is an arithmetic number, because the mean of its divisors is an integer number (37568559336).

Almost surely, 2^278996723993 is an apocalyptic number.

It is an amenable number.

278996723993 is a deficient number, since it is larger than the sum of its proper divisors (21551750695).

278996723993 is a wasteful number, since it uses less digits than its factorization.

278996723993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461743.

The product of its digits is 555532992, while the sum is 74.

The spelling of 278996723993 in words is "two hundred seventy-eight billion, nine hundred ninety-six million, seven hundred twenty-three thousand, nine hundred ninety-three".