1277216164 has 36 divisors (see below), whose sum is σ = 2655386496. Its totient is φ = 535728144.

The previous prime is 1277216131. The next prime is 1277216191. The reversal of 1277216164 is 4616127721.

It is a super-2 number, since 2×1277216164² = 3262562259165749792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60112 + ... + 78535.

It is an arithmetic number, because the mean of its divisors is an integer number (73760736).

Almost surely, 2^1277216164 is an apocalyptic number.

1277216164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1277216164 is an abundant number, since it is smaller than the sum of its proper divisors (1378170332).

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

1277216164 is a wasteful number, since it uses less digits than its factorization.

1277216164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138712 (or 138703 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 1277216164 is about 35738.1611726177. The cubic root of 1277216164 is about 1084.9793405709.

The spelling of 1277216164 in words is "one billion, two hundred seventy-seven million, two hundred sixteen thousand, one hundred sixty-four".