6410978356 has 12 divisors (see below), whose sum is σ = 11222370180. Its totient is φ = 3204586880.

The previous prime is 6410978311. The next prime is 6410978359. The reversal of 6410978356 is 6538790146.

It can be written as a sum of positive squares in 2 ways, for example, as 3197902500 + 3213075856 = 56550^2 + 56684^2 .

It is a super-2 number, since 2×6410978356² = 82201286962200925472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6410978359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209461 + ... + 238108.

It is an arithmetic number, because the mean of its divisors is an integer number (935197515).

Almost surely, 2^6410978356 is an apocalyptic number.

It is an amenable number.

6410978356 is a deficient number, since it is larger than the sum of its proper divisors (4811391824).

6410978356 is a wasteful number, since it uses less digits than its factorization.

6410978356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451154 (or 451152 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 6410978356 is about 80068.5853253322. The cubic root of 6410978356 is about 1857.6965314800.

The spelling of 6410978356 in words is "six billion, four hundred ten million, nine hundred seventy-eight thousand, three hundred fifty-six".