1240351551999 has 96 divisors (see below), whose sum is σ = 2113628774400. Its totient is φ = 686284925760.

The previous prime is 1240351551979. The next prime is 1240351552001. The reversal of 1240351551999 is 9991551530421.

1240351551999 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 35 + 1 + 5 + 519 + 99 = 666.

It is not a de Polignac number, because 1240351551999 - 2⁸ = 1240351551743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240351551979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 427263982 + ... + 427266884.

It is an arithmetic number, because the mean of its divisors is an integer number (22016966400).

Almost surely, 2^{1240351551999} is an apocalyptic number.

1240351551999 is a deficient number, since it is larger than the sum of its proper divisors (873277222401).

1240351551999 is a wasteful number, since it uses less digits than its factorization.

1240351551999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665 (or 4662 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 54.

The spelling of 1240351551999 in words is "one trillion, two hundred forty billion, three hundred fifty-one million, five hundred fifty-one thousand, nine hundred ninety-nine".