1240891247808 has 112 divisors (see below), whose sum is σ = 3648437468160. Its totient is φ = 413579734272.

The previous prime is 1240891247801. The next prime is 1240891247819. The reversal of 1240891247808 is 8087421980421.

1240891247808 is a `hidden beast` number, since 1 + 240 + 89 + 1 + 247 + 80 + 8 = 666.

It is a super-2 number, since 2×1240891247808² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1240891247801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15690541 + ... + 15769427.

Almost surely, 2^{1240891247808} is an apocalyptic number.

1240891247808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1240891247808 is an abundant number, since it is smaller than the sum of its proper divisors (2407546220352).

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

1240891247808 is an equidigital number, since it uses as much as digits as its factorization.

1240891247808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88011 (or 87995 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 1240891247808 in words is "one trillion, two hundred forty billion, eight hundred ninety-one million, two hundred forty-seven thousand, eight hundred eight".