63740043751 has 4 divisors (see below), whose sum is σ = 63759091032. Its totient is φ = 63720996472.

The previous prime is 63740043749. The next prime is 63740043791. The reversal of 63740043751 is 15734004736.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63740043751 - 2¹ = 63740043749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63740043791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9518620 + ... + 9525313.

It is an arithmetic number, because the mean of its divisors is an integer number (15939772758).

Almost surely, 2^63740043751 is an apocalyptic number.

63740043751 is a deficient number, since it is larger than the sum of its proper divisors (19047281).

63740043751 is a wasteful number, since it uses less digits than its factorization.

63740043751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19047280.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 63740043751 in words is "sixty-three billion, seven hundred forty million, forty-three thousand, seven hundred fifty-one".