278135992996 has 27 divisors (see below), whose sum is σ = 489980349579. Its totient is φ = 138147707928.

The previous prime is 278135992991. The next prime is 278135993021. The reversal of 278135992996 is 699299531872.

The square root of 278135992996 is 527386.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×278135992996² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278135992991) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 176146135 + ... + 176147713.

Almost surely, 2^278135992996 is an apocalyptic number.

278135992996 is the 527386-th square number.

It is an amenable number.

278135992996 is a deficient number, since it is larger than the sum of its proper divisors (211844356583).

278135992996 is an frugal number, since it uses more digits than its factorization.

278135992996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496 (or 1748 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 70.

The spelling of 278135992996 in words is "two hundred seventy-eight billion, one hundred thirty-five million, nine hundred ninety-two thousand, nine hundred ninety-six".