61550741563 has 8 divisors (see below), whose sum is σ = 62438121216. Its totient is φ = 60663930600.

The previous prime is 61550741561. The next prime is 61550741573. The reversal of 61550741563 is 36514705516.

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

It is a cyclic number.

It is not a de Polignac number, because 61550741563 - 2¹ = 61550741561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61550741561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78298 + ... + 359488.

It is an arithmetic number, because the mean of its divisors is an integer number (7804765152).

Almost surely, 2^61550741563 is an apocalyptic number.

61550741563 is a deficient number, since it is larger than the sum of its proper divisors (887379653).

61550741563 is a wasteful number, since it uses less digits than its factorization.

61550741563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284345.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 61550741563 in words is "sixty-one billion, five hundred fifty million, seven hundred forty-one thousand, five hundred sixty-three".