64040394610 has 8 divisors (see below), whose sum is σ = 115272710316. Its totient is φ = 25616157840.

The previous prime is 64040394599. The next prime is 64040394617. The reversal of 64040394610 is 1649304046.

It can be written as a sum of positive squares in 2 ways, for example, as 56882727001 + 7157667609 = 238501^2 + 84603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64040394610.

It is not an unprimeable number, because it can be changed into a prime (64040394617) 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, 3202019721 + ... + 3202019740.

Almost surely, 2^64040394610 is an apocalyptic number.

64040394610 is a deficient number, since it is larger than the sum of its proper divisors (51232315706).

64040394610 is a wasteful number, since it uses less digits than its factorization.

64040394610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404039468.

The product of its (nonzero) digits is 62208, while the sum is 37.

Adding to 64040394610 its reverse (1649304046), we get a palindrome (65689698656).

The spelling of 64040394610 in words is "sixty-four billion, forty million, three hundred ninety-four thousand, six hundred ten".