154378870815 has 32 divisors (see below), whose sum is σ = 266053455360. Its totient is φ = 75988538496.

The previous prime is 154378870783. The next prime is 154378870843. The reversal of 154378870815 is 518078873451.

It is a happy number.

154378870815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 154378870815 - 2⁵ = 154378870783 is a prime.

It is a super-2 number, since 2×154378870815² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1091454 + ... + 1224756.

It is an arithmetic number, because the mean of its divisors is an integer number (8314170480).

Almost surely, 2^154378870815 is an apocalyptic number.

154378870815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

154378870815 is a deficient number, since it is larger than the sum of its proper divisors (111674584545).

154378870815 is a wasteful number, since it uses less digits than its factorization.

154378870815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139263.

The product of its (nonzero) digits is 7526400, while the sum is 57.

The spelling of 154378870815 in words is "one hundred fifty-four billion, three hundred seventy-eight million, eight hundred seventy thousand, eight hundred fifteen".