63507521427 has 16 divisors (see below), whose sum is σ = 96778122240. Its totient is φ = 36288228672.

The previous prime is 63507521419. The next prime is 63507521437. The reversal of 63507521427 is 72412570536.

It is not a de Polignac number, because 63507521427 - 2³ = 63507521419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63507521437) 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 15 ways as a sum of consecutive naturals, for example, 448758 + ... + 573060.

It is an arithmetic number, because the mean of its divisors is an integer number (6048632640).

Almost surely, 2^63507521427 is an apocalyptic number.

63507521427 is a deficient number, since it is larger than the sum of its proper divisors (33270600813).

63507521427 is a wasteful number, since it uses less digits than its factorization.

63507521427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148642.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 63507521427 in words is "sixty-three billion, five hundred seven million, five hundred twenty-one thousand, four hundred twenty-seven".