6156378515 has 16 divisors (see below), whose sum is σ = 8446291200. Its totient is φ = 4219887840.

The previous prime is 6156378511. The next prime is 6156378517. The reversal of 6156378515 is 5158736516.

It is not a de Polignac number, because 6156378515 - 2² = 6156378511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6156378515.

It is not an unprimeable number, because it can be changed into a prime (6156378511) 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 15 ways as a sum of consecutive naturals, for example, 61880 + ... + 127050.

It is an arithmetic number, because the mean of its divisors is an integer number (527893200).

Almost surely, 2^6156378515 is an apocalyptic number.

6156378515 is a deficient number, since it is larger than the sum of its proper divisors (2289912685).

6156378515 is a wasteful number, since it uses less digits than its factorization.

6156378515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67882.

The product of its digits is 756000, while the sum is 47.

The square root of 6156378515 is about 78462.5930937794. The cubic root of 6156378515 is about 1832.7719857329.

The spelling of 6156378515 in words is "six billion, one hundred fifty-six million, three hundred seventy-eight thousand, five hundred fifteen".