61527404779 has 4 divisors (see below), whose sum is σ = 61542295776. Its totient is φ = 61512513784.

The previous prime is 61527404777. The next prime is 61527404789. The reversal of 61527404779 is 97740472516.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61527404779 - 2¹ = 61527404777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61527404777) 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, 7439299 + ... + 7447564.

It is an arithmetic number, because the mean of its divisors is an integer number (15385573944).

Almost surely, 2^61527404779 is an apocalyptic number.

61527404779 is a deficient number, since it is larger than the sum of its proper divisors (14890997).

61527404779 is a wasteful number, since it uses less digits than its factorization.

61527404779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14890996.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 61527404779 in words is "sixty-one billion, five hundred twenty-seven million, four hundred four thousand, seven hundred seventy-nine".