427661582699 has 16 divisors (see below), whose sum is σ = 471113330688. Its totient is φ = 385810441632.

The previous prime is 427661582693. The next prime is 427661582723. The reversal of 427661582699 is 996285166724.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427661582699 is a prime.

It is a super-2 number, since 2×427661582699² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (427661582693) 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, 1822457 + ... + 2043690.

It is an arithmetic number, because the mean of its divisors is an integer number (29444583168).

Almost surely, 2^427661582699 is an apocalyptic number.

427661582699 is a deficient number, since it is larger than the sum of its proper divisors (43451747989).

427661582699 is a wasteful number, since it uses less digits than its factorization.

427661582699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866354.

The product of its digits is 78382080, while the sum is 65.

The spelling of 427661582699 in words is "four hundred twenty-seven billion, six hundred sixty-one million, five hundred eighty-two thousand, six hundred ninety-nine".