15240667778387 has 2 divisors, whose sum is σ = 15240667778388. Its totient is φ = 15240667778386.

The previous prime is 15240667778333. The next prime is 15240667778393. The reversal of 15240667778387 is 78387776604251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15240667778387 - 2¹⁴ = 15240667762003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15240667778387.

It is not a weakly prime, because it can be changed into another prime (15240667778587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620333889193 + 7620333889194.

It is an arithmetic number, because the mean of its divisors is an integer number (7620333889194).

Almost surely, 2^{15240667778387} is an apocalyptic number.

15240667778387 is a deficient number, since it is larger than the sum of its proper divisors (1).

15240667778387 is an equidigital number, since it uses as much as digits as its factorization.

15240667778387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663828480, while the sum is 71.

The spelling of 15240667778387 in words is "fifteen trillion, two hundred forty billion, six hundred sixty-seven million, seven hundred seventy-eight thousand, three hundred eighty-seven".