281079206378 has 4 divisors (see below), whose sum is σ = 421618809570. Its totient is φ = 140539603188.

The previous prime is 281079206329. The next prime is 281079206389. The reversal of 281079206378 is 873602970182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 221231944609 + 59847261769 = 470353^2 + 244637^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70269801593 + ... + 70269801596.

Almost surely, 2^281079206378 is an apocalyptic number.

281079206378 is a deficient number, since it is larger than the sum of its proper divisors (140539603192).

281079206378 is a wasteful number, since it uses less digits than its factorization.

281079206378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140539603191.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 281079206378 in words is "two hundred eighty-one billion, seventy-nine million, two hundred six thousand, three hundred seventy-eight".