6400063970 has 16 divisors (see below), whose sum is σ = 11634177528. Its totient is φ = 2534678400.

The previous prime is 6400063951. The next prime is 6400063991. The reversal of 6400063970 is 793600046.

It can be written as a sum of positive squares in 4 ways, for example, as 6273748849 + 126315121 = 79207^2 + 11239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6400063970.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167339 + ... + 3169358.

Almost surely, 2^6400063970 is an apocalyptic number.

6400063970 is a deficient number, since it is larger than the sum of its proper divisors (5234113558).

6400063970 is a wasteful number, since it uses less digits than its factorization.

6400063970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336805.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 6400063970 is about 80000.3998115009. The cubic root of 6400063970 is about 1856.6417193086.

The spelling of 6400063970 in words is "six billion, four hundred million, sixty-three thousand, nine hundred seventy".