427737920991 has 4 divisors (see below), whose sum is σ = 570317227992. Its totient is φ = 285158613992.

The previous prime is 427737920957. The next prime is 427737921001. The reversal of 427737920991 is 199029737724.

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 427737920991 - 2⁶ = 427737920927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427737920921) 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, 71289653496 + ... + 71289653501.

It is an arithmetic number, because the mean of its divisors is an integer number (142579306998).

Almost surely, 2^427737920991 is an apocalyptic number.

427737920991 is a deficient number, since it is larger than the sum of its proper divisors (142579307001).

427737920991 is a wasteful number, since it uses less digits than its factorization.

427737920991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142579307000.

The product of its (nonzero) digits is 12002256, while the sum is 60.

The spelling of 427737920991 in words is "four hundred twenty-seven billion, seven hundred thirty-seven million, nine hundred twenty thousand, nine hundred ninety-one".