427896537991 has 8 divisors (see below), whose sum is σ = 460883512544. Its totient is φ = 394919828640.

The previous prime is 427896537949. The next prime is 427896538001. The reversal of 427896537991 is 199735698724.

It is a happy number.

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 427896537991 - 2⁷ = 427896537863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427896537991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427896537931) 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, 2479611 + ... + 2646556.

It is an arithmetic number, because the mean of its divisors is an integer number (57610439068).

Almost surely, 2^427896537991 is an apocalyptic number.

427896537991 is a deficient number, since it is larger than the sum of its proper divisors (32986974553).

427896537991 is a wasteful number, since it uses less digits than its factorization.

427896537991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132601.

The product of its digits is 205752960, while the sum is 70.

The spelling of 427896537991 in words is "four hundred twenty-seven billion, eight hundred ninety-six million, five hundred thirty-seven thousand, nine hundred ninety-one".