61301561563 has 8 divisors (see below), whose sum is σ = 70394137920. Its totient is φ = 52795603080.

The previous prime is 61301561551. The next prime is 61301561567. The reversal of 61301561563 is 36516510316.

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

It is not a de Polignac number, because 61301561563 - 2¹³ = 61301553371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61301561567) 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, 146654245 + ... + 146654662.

It is an arithmetic number, because the mean of its divisors is an integer number (8799267240).

Almost surely, 2^61301561563 is an apocalyptic number.

61301561563 is a deficient number, since it is larger than the sum of its proper divisors (9092576357).

61301561563 is a wasteful number, since it uses less digits than its factorization.

61301561563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293308937.

The product of its (nonzero) digits is 48600, while the sum is 37.

The spelling of 61301561563 in words is "sixty-one billion, three hundred one million, five hundred sixty-one thousand, five hundred sixty-three".