1277911464 has 32 divisors (see below), whose sum is σ = 3333683520. Its totient is φ = 407449856.

The previous prime is 1277911457. The next prime is 1277911469. The reversal of 1277911464 is 4641197721.

It is a super-4 number, since 4×1277911464⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1277911469) by changing a digit.

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, 1156977 + ... + 1158080.

It is an arithmetic number, because the mean of its divisors is an integer number (104177610).

Almost surely, 2^1277911464 is an apocalyptic number.

It is an amenable number.

1277911464 is an abundant number, since it is smaller than the sum of its proper divisors (2055772056).

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

1277911464 is a wasteful number, since it uses less digits than its factorization.

1277911464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315089 (or 2315085 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 1277911464 is about 35747.8875459796. The cubic root of 1277911464 is about 1085.1761877728.

The spelling of 1277911464 in words is "one billion, two hundred seventy-seven million, nine hundred eleven thousand, four hundred sixty-four".