1277030664 has 128 divisors (see below), whose sum is σ = 4365984000. Its totient is φ = 336794112.

The previous prime is 1277030659. The next prime is 1277030681. The reversal of 1277030664 is 4660307721.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 12829 + ... + 52140.

It is an arithmetic number, because the mean of its divisors is an integer number (34109250).

Almost surely, 2^1277030664 is an apocalyptic number.

1277030664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1277030664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182992000).

1277030664 is an abundant number, since it is smaller than the sum of its proper divisors (3088953336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1277030664 is a wasteful number, since it uses less digits than its factorization.

1277030664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65004 (or 64994 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 1277030664 is about 35735.5658133462. The cubic root of 1277030664 is about 1084.9268113755.

It can be divided in two parts, 12770 and 30664, that added together give a palindrome (43434).

The spelling of 1277030664 in words is "one billion, two hundred seventy-seven million, thirty thousand, six hundred sixty-four".