1276660227888 has 80 divisors (see below), whose sum is σ = 3880045812960. Its totient is φ = 400520853504.

The previous prime is 1276660227859. The next prime is 1276660227917. The reversal of 1276660227888 is 8887220666721.

It is an interprime number because it is at equal distance from previous prime (1276660227859) and next prime (1276660227917).

It is a super-2 number, since 2×1276660227888² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86911245 + ... + 86925932.

It is an arithmetic number, because the mean of its divisors is an integer number (48500572662).

Almost surely, 2^{1276660227888} is an apocalyptic number.

1276660227888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1276660227888 is an abundant number, since it is smaller than the sum of its proper divisors (2603385585072).

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

1276660227888 is a wasteful number, since it uses less digits than its factorization.

1276660227888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173837211 (or 173837199 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 1276660227888 in words is "one trillion, two hundred seventy-six billion, six hundred sixty million, two hundred twenty-seven thousand, eight hundred eighty-eight".