1264663063440 has 200 divisors, whose sum is σ = 5019842667840. Its totient is φ = 289065832704.

The previous prime is 1264663063373. The next prime is 1264663063507. The reversal of 1264663063440 is 443603664621.

1264663063440 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 6 + 6 + 3 + 0 + 634 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1264663063373) and next prime (1264663063507).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13894930 + ... + 13985649.

Almost surely, 2^{1264663063440} is an apocalyptic number.

1264663063440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264663063440 is an abundant number, since it is smaller than the sum of its proper divisors (3755179604400).

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

1264663063440 is a wasteful number, since it uses less digits than its factorization.

1264663063440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27880611 (or 27880596 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 45.

The spelling of 1264663063440 in words is "one trillion, two hundred sixty-four billion, six hundred sixty-three million, sixty-three thousand, four hundred forty".