1277385016 has 32 divisors (see below), whose sum is σ = 2433997440. Its totient is φ = 628344288.

The previous prime is 1277385007. The next prime is 1277385037. The reversal of 1277385016 is 6105837721.

It is a self number, because there is not a number n which added to its sum of digits gives 1277385016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794085 + ... + 795691.

It is an arithmetic number, because the mean of its divisors is an integer number (76062420).

Almost surely, 2^1277385016 is an apocalyptic number.

It is an amenable number.

1277385016 is a deficient number, since it is larger than the sum of its proper divisors (1156612424).

1277385016 is a wasteful number, since it uses less digits than its factorization.

1277385016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163 (or 3159 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 1277385016 is about 35740.5234432849. The cubic root of 1277385016 is about 1085.0271510262.

The spelling of 1277385016 in words is "one billion, two hundred seventy-seven million, three hundred eighty-five thousand, sixteen".