61769631636 has 36 divisors (see below), whose sum is σ = 164357793600. Its totient is φ = 19506199248.

The previous prime is 61769631629. The next prime is 61769631661. The reversal of 61769631636 is 63613696716.

61769631636 is a `hidden beast` number, since 617 + 6 + 9 + 6 + 3 + 16 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45152556 + ... + 45153923.

Almost surely, 2^61769631636 is an apocalyptic number.

It is an amenable number.

61769631636 is an abundant number, since it is smaller than the sum of its proper divisors (102588161964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61769631636 is a wasteful number, since it uses less digits than its factorization.

61769631636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90306508 (or 90306503 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The spelling of 61769631636 in words is "sixty-one billion, seven hundred sixty-nine million, six hundred thirty-one thousand, six hundred thirty-six".