1680201278 has 16 divisors (see below), whose sum is σ = 2939128800. Its totient is φ = 720085968.

The previous prime is 1680201269. The next prime is 1680201329. The reversal of 1680201278 is 8721020861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223951 + ... + 1225322.

It is an arithmetic number, because the mean of its divisors is an integer number (183695550).

Almost surely, 2^1680201278 is an apocalyptic number.

1680201278 is a deficient number, since it is larger than the sum of its proper divisors (1258927522).

1680201278 is an equidigital number, since it uses as much as digits as its factorization.

1680201278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449296 (or 2449282 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1680201278 is about 40990.2583304863. The cubic root of 1680201278 is about 1188.8318640823.

The spelling of 1680201278 in words is "one billion, six hundred eighty million, two hundred one thousand, two hundred seventy-eight".