1240253515155 has 32 divisors (see below), whose sum is σ = 1998619372800. Its totient is φ = 656734608000.

The previous prime is 1240253515153. The next prime is 1240253515169. The reversal of 1240253515155 is 5515153520421.

It is not a de Polignac number, because 1240253515155 - 2¹ = 1240253515153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240253515153) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4907724 + ... + 5154246.

It is an arithmetic number, because the mean of its divisors is an integer number (62456855400).

Almost surely, 2^{1240253515155} is an apocalyptic number.

1240253515155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1240253515155 is a deficient number, since it is larger than the sum of its proper divisors (758365857645).

1240253515155 is a wasteful number, since it uses less digits than its factorization.

1240253515155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248931.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 1240253515155 in words is "one trillion, two hundred forty billion, two hundred fifty-three million, five hundred fifteen thousand, one hundred fifty-five".