6285661681 has 16 divisors (see below), whose sum is σ = 7130672640. Its totient is φ = 5492741760.

The previous prime is 6285661667. The next prime is 6285661703. The reversal of 6285661681 is 1861665826.

It is a cyclic number.

It is not a de Polignac number, because 6285661681 - 2¹³ = 6285653489 is a prime.

It is a super-2 number, since 2×6285661681² = 79019085535983491522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6285661621) 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, 357216 + ... + 374398.

It is an arithmetic number, because the mean of its divisors is an integer number (445667040).

Almost surely, 2^6285661681 is an apocalyptic number.

It is an amenable number.

6285661681 is a deficient number, since it is larger than the sum of its proper divisors (845010959).

6285661681 is a wasteful number, since it uses less digits than its factorization.

6285661681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18696.

The product of its digits is 829440, while the sum is 49.

The square root of 6285661681 is about 79282.1649616104. The cubic root of 6285661681 is about 1845.5125404811.

The spelling of 6285661681 in words is "six billion, two hundred eighty-five million, six hundred sixty-one thousand, six hundred eighty-one".