83560551891 has 4 divisors (see below), whose sum is σ = 111414069192. Its totient is φ = 55707034592.

The previous prime is 83560551857. The next prime is 83560551913. The reversal of 83560551891 is 19815506538.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83560551891 - 2¹⁴ = 83560535507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83560551091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13926758646 + ... + 13926758651.

It is an arithmetic number, because the mean of its divisors is an integer number (27853517298).

Almost surely, 2^83560551891 is an apocalyptic number.

83560551891 is a deficient number, since it is larger than the sum of its proper divisors (27853517301).

83560551891 is a wasteful number, since it uses less digits than its factorization.

83560551891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27853517300.

The product of its (nonzero) digits is 1296000, while the sum is 51.

The spelling of 83560551891 in words is "eighty-three billion, five hundred sixty million, five hundred fifty-one thousand, eight hundred ninety-one".