61634064650 has 12 divisors (see below), whose sum is σ = 114639360342. Its totient is φ = 24653625840.

The previous prime is 61634064649. The next prime is 61634064659. The reversal of 61634064650 is 5646043616.

It can be written as a sum of positive squares in 3 ways, for example, as 44273630569 + 17360434081 = 210413^2 + 131759^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61634064598 and 61634064607.

It is not an unprimeable number, because it can be changed into a prime (61634064659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616340597 + ... + 616340696.

Almost surely, 2^61634064650 is an apocalyptic number.

61634064650 is a deficient number, since it is larger than the sum of its proper divisors (53005295692).

61634064650 is a wasteful number, since it uses less digits than its factorization.

61634064650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232681305 (or 1232681300 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 61634064650 in words is "sixty-one billion, six hundred thirty-four million, sixty-four thousand, six hundred fifty".