64293834650 has 12 divisors (see below), whose sum is σ = 119586532542. Its totient is φ = 25717533840.

The previous prime is 64293834617. The next prime is 64293834769. The reversal of 64293834650 is 5643839246.

It can be written as a sum of positive squares in 3 ways, for example, as 56382977401 + 7910857249 = 237451^2 + 88943^2 .

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 1285876693 = 64293834650 / (6 + 4 + 2 + 9 + 3 + 8 + 3 + 4 + 6 + 5 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642938297 + ... + 642938396.

Almost surely, 2^64293834650 is an apocalyptic number.

64293834650 is a deficient number, since it is larger than the sum of its proper divisors (55292697892).

64293834650 is a wasteful number, since it uses less digits than its factorization.

64293834650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285876705 (or 1285876700 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 64293834650 in words is "sixty-four billion, two hundred ninety-three million, eight hundred thirty-four thousand, six hundred fifty".