63501002661 has 16 divisors (see below), whose sum is σ = 86521641984. Its totient is φ = 41408270064.

The previous prime is 63501002659. The next prime is 63501002681. The reversal of 63501002661 is 16620010536.

It is not a de Polignac number, because 63501002661 - 2¹ = 63501002659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63501002651) 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, 99966 + ... + 370128.

It is an arithmetic number, because the mean of its divisors is an integer number (5407602624).

Almost surely, 2^63501002661 is an apocalyptic number.

It is an amenable number.

63501002661 is a deficient number, since it is larger than the sum of its proper divisors (23020639323).

63501002661 is a wasteful number, since it uses less digits than its factorization.

63501002661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271880.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 63501002661 in words is "sixty-three billion, five hundred one million, two thousand, six hundred sixty-one".