63551243571 has 16 divisors (see below), whose sum is σ = 88820350080. Its totient is φ = 40372879680.

The previous prime is 63551243519. The next prime is 63551243603. The reversal of 63551243571 is 17534215536.

It is not a de Polignac number, because 63551243571 - 2⁶ = 63551243507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63551243501) 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, 6002581 + ... + 6013158.

It is an arithmetic number, because the mean of its divisors is an integer number (5551271880).

Almost surely, 2^63551243571 is an apocalyptic number.

63551243571 is a deficient number, since it is larger than the sum of its proper divisors (25269106509).

63551243571 is a wasteful number, since it uses less digits than its factorization.

63551243571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12015826.

The product of its digits is 378000, while the sum is 42.

The spelling of 63551243571 in words is "sixty-three billion, five hundred fifty-one million, two hundred forty-three thousand, five hundred seventy-one".