63548747781 has 8 divisors (see below), whose sum is σ = 86330374560. Its totient is φ = 41566476432.

The previous prime is 63548747767. The next prime is 63548747783. The reversal of 63548747781 is 18774784536.

63548747781 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 not a de Polignac number, because 63548747781 - 2¹³ = 63548739589 is a prime.

It is a super-2 number, since 2×63548747781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63548747783) 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, 199838671 + ... + 199838988.

It is an arithmetic number, because the mean of its divisors is an integer number (10791296820).

Almost surely, 2^63548747781 is an apocalyptic number.

It is an amenable number.

63548747781 is a deficient number, since it is larger than the sum of its proper divisors (22781626779).

63548747781 is a wasteful number, since it uses less digits than its factorization.

63548747781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399677715.

The product of its digits is 31610880, while the sum is 60.

The spelling of 63548747781 in words is "sixty-three billion, five hundred forty-eight million, seven hundred forty-seven thousand, seven hundred eighty-one".