427687449639 has 16 divisors (see below), whose sum is σ = 590008665600. Its totient is φ = 275248764896.

The previous prime is 427687449599. The next prime is 427687449647. The reversal of 427687449639 is 936944786724.

It is a cyclic number.

It is not a de Polignac number, because 427687449639 - 2⁹ = 427687449127 is a prime.

It is a super-2 number, since 2×427687449639² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427687447639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152422 + ... + 937340.

It is an arithmetic number, because the mean of its divisors is an integer number (36875541600).

Almost surely, 2^427687449639 is an apocalyptic number.

427687449639 is a deficient number, since it is larger than the sum of its proper divisors (162321215961).

427687449639 is a wasteful number, since it uses less digits than its factorization.

427687449639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791214.

The product of its digits is 438939648, while the sum is 69.

The spelling of 427687449639 in words is "four hundred twenty-seven billion, six hundred eighty-seven million, four hundred forty-nine thousand, six hundred thirty-nine".