61688787349 has 8 divisors (see below), whose sum is σ = 74648616768. Its totient is φ = 49765744320.

The previous prime is 61688787337. The next prime is 61688787367. The reversal of 61688787349 is 94378788616.

It is a happy number.

61688787349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61688787349 - 2⁵ = 61688787317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61688787049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259196467 + ... + 259196704.

It is an arithmetic number, because the mean of its divisors is an integer number (9331077096).

Almost surely, 2^61688787349 is an apocalyptic number.

It is an amenable number.

61688787349 is a deficient number, since it is larger than the sum of its proper divisors (12959829419).

61688787349 is a wasteful number, since it uses less digits than its factorization.

61688787349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518393195.

The product of its digits is 97542144, while the sum is 67.

The spelling of 61688787349 in words is "sixty-one billion, six hundred eighty-eight million, seven hundred eighty-seven thousand, three hundred forty-nine".