61563550010 has 32 divisors (see below), whose sum is σ = 114387221520. Its totient is φ = 23838216192.

The previous prime is 61563549919. The next prime is 61563550021. The reversal of 61563550010 is 1005536516.

It can be written as a sum of positive squares in 8 ways, for example, as 60463367449 + 1100182561 = 245893^2 + 33169^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349415 + ... + 495194.

Almost surely, 2^61563550010 is an apocalyptic number.

61563550010 is a deficient number, since it is larger than the sum of its proper divisors (52823671510).

61563550010 is a wasteful number, since it uses less digits than its factorization.

61563550010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844850.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 61563550010 in words is "sixty-one billion, five hundred sixty-three million, five hundred fifty thousand, ten".