6219156478 has 16 divisors (see below), whose sum is σ = 10107195120. Its totient is φ = 2858599296.

The previous prime is 6219156473. The next prime is 6219156499. The reversal of 6219156478 is 8746519126.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6219156473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125473 + ... + 2128396.

It is an arithmetic number, because the mean of its divisors is an integer number (631699695).

Almost surely, 2^6219156478 is an apocalyptic number.

6219156478 is a deficient number, since it is larger than the sum of its proper divisors (3888038642).

6219156478 is a wasteful number, since it uses less digits than its factorization.

6219156478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253931.

The product of its digits is 725760, while the sum is 49.

The square root of 6219156478 is about 78861.6286796056. The cubic root of 6219156478 is about 1838.9806576337.

The spelling of 6219156478 in words is "six billion, two hundred nineteen million, one hundred fifty-six thousand, four hundred seventy-eight".