1277483864 has 8 divisors (see below), whose sum is σ = 2395282260. Its totient is φ = 638741928.

The previous prime is 1277483849. The next prime is 1277483869. The reversal of 1277483864 is 4683847721.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277483869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79842734 + ... + 79842749.

Almost surely, 2^1277483864 is an apocalyptic number.

It is an amenable number.

1277483864 is a deficient number, since it is larger than the sum of its proper divisors (1117798396).

1277483864 is a wasteful number, since it uses less digits than its factorization.

1277483864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159685489 (or 159685485 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The square root of 1277483864 is about 35741.9062726095. The cubic root of 1277483864 is about 1085.0551378890.

The spelling of 1277483864 in words is "one billion, two hundred seventy-seven million, four hundred eighty-three thousand, eight hundred sixty-four".