61563925983 has 8 divisors (see below), whose sum is σ = 93811696768. Its totient is φ = 35179386264.

The previous prime is 61563925963. The next prime is 61563925993. The reversal of 61563925983 is 38952936516.

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

It is not a de Polignac number, because 61563925983 - 2¹³ = 61563917791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61563925933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465807741 + ... + 1465807782.

It is an arithmetic number, because the mean of its divisors is an integer number (11726462096).

Almost surely, 2^61563925983 is an apocalyptic number.

61563925983 is a deficient number, since it is larger than the sum of its proper divisors (32247770785).

61563925983 is a wasteful number, since it uses less digits than its factorization.

61563925983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931615533.

The product of its digits is 10497600, while the sum is 57.

The spelling of 61563925983 in words is "sixty-one billion, five hundred sixty-three million, nine hundred twenty-five thousand, nine hundred eighty-three".