61333513077 has 4 divisors (see below), whose sum is σ = 81778017440. Its totient is φ = 40889008716.

The previous prime is 61333513069. The next prime is 61333513093. The reversal of 61333513077 is 77031533316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61333513077 - 2³ = 61333513069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61333513877) 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, 10222252177 + ... + 10222252182.

It is an arithmetic number, because the mean of its divisors is an integer number (20444504360).

Almost surely, 2^61333513077 is an apocalyptic number.

It is an amenable number.

61333513077 is a deficient number, since it is larger than the sum of its proper divisors (20444504363).

61333513077 is a wasteful number, since it uses less digits than its factorization.

61333513077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20444504362.

The product of its (nonzero) digits is 119070, while the sum is 39.

The spelling of 61333513077 in words is "sixty-one billion, three hundred thirty-three million, five hundred thirteen thousand, seventy-seven".