1240097534865 has 96 divisors (see below), whose sum is σ = 2543991690240. Its totient is φ = 547046172288.

The previous prime is 1240097534849. The next prime is 1240097534887. The reversal of 1240097534865 is 5684357900421.

It is a happy number.

1240097534865 is a `hidden beast` number, since 1 + 2 + 40 + 0 + 9 + 7 + 534 + 8 + 65 = 666.

It is not a de Polignac number, because 1240097534865 - 2⁴ = 1240097534849 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 572706 + ... + 1675764.

It is an arithmetic number, because the mean of its divisors is an integer number (26499913440).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1240097534865 = 2480195069730, but 3⋅1240097534865 = 3720292604595 is not.

Almost surely, 2^{1240097534865} is an apocalyptic number.

1240097534865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240097534865 is an abundant number, since it is smaller than the sum of its proper divisors (1303894155375).

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

1240097534865 is a wasteful number, since it uses less digits than its factorization.

1240097534865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103203 (or 1103200 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 1240097534865 in words is "one trillion, two hundred forty billion, ninety-seven million, five hundred thirty-four thousand, eight hundred sixty-five".