83561398761 has 8 divisors (see below), whose sum is σ = 111417374880. Its totient is φ = 55706510912.

The previous prime is 83561398741. The next prime is 83561398799. The reversal of 83561398761 is 16789316538.

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 83561398761 - 2¹⁰ = 83561397737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83561398741) 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, 71856 + ... + 415073.

It is an arithmetic number, because the mean of its divisors is an integer number (13927171860).

Almost surely, 2^83561398761 is an apocalyptic number.

It is an amenable number.

83561398761 is a deficient number, since it is larger than the sum of its proper divisors (27855976119).

83561398761 is a wasteful number, since it uses less digits than its factorization.

83561398761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544135.

The product of its digits is 6531840, while the sum is 57.

The spelling of 83561398761 in words is "eighty-three billion, five hundred sixty-one million, three hundred ninety-eight thousand, seven hundred sixty-one".