61635048771 has 4 divisors (see below), whose sum is σ = 82180065032. Its totient is φ = 41090032512.

The previous prime is 61635048731. The next prime is 61635048817. The reversal of 61635048771 is 17784053616.

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

It is not a de Polignac number, because 61635048771 - 2²⁹ = 61098177859 is a prime.

It is a super-2 number, since 2×61635048771² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61635048771.

It is not an unprimeable number, because it can be changed into a prime (61635048731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10272508126 + ... + 10272508131.

It is an arithmetic number, because the mean of its divisors is an integer number (20545016258).

Almost surely, 2^61635048771 is an apocalyptic number.

61635048771 is a deficient number, since it is larger than the sum of its proper divisors (20545016261).

61635048771 is a wasteful number, since it uses less digits than its factorization.

61635048771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20545016260.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 61635048771 in words is "sixty-one billion, six hundred thirty-five million, forty-eight thousand, seven hundred seventy-one".