63854371561 has 8 divisors (see below), whose sum is σ = 64896336000. Its totient is φ = 62819618400.

The previous prime is 63854371541. The next prime is 63854371573. The reversal of 63854371561 is 16517345836.

63854371561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63854371561 - 2¹³ = 63854363369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63854371531) 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, 1784965 + ... + 1820386.

It is an arithmetic number, because the mean of its divisors is an integer number (8112042000).

Almost surely, 2^63854371561 is an apocalyptic number.

It is an amenable number.

63854371561 is a deficient number, since it is larger than the sum of its proper divisors (1041964439).

63854371561 is a wasteful number, since it uses less digits than its factorization.

63854371561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605639.

The product of its digits is 1814400, while the sum is 49.

The spelling of 63854371561 in words is "sixty-three billion, eight hundred fifty-four million, three hundred seventy-one thousand, five hundred sixty-one".