61305376775 has 24 divisors (see below), whose sum is σ = 78131707584. Its totient is φ = 47683036800.

The previous prime is 61305376771. The next prime is 61305376777. The reversal of 61305376775 is 57767350316.

It is not a de Polignac number, because 61305376775 - 2² = 61305376771 is a prime.

It is a super-3 number, since 3×61305376775³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61305376771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1245890 + ... + 1294160.

It is an arithmetic number, because the mean of its divisors is an integer number (3255487816).

Almost surely, 2^61305376775 is an apocalyptic number.

61305376775 is a deficient number, since it is larger than the sum of its proper divisors (16826330809).

61305376775 is a wasteful number, since it uses less digits than its factorization.

61305376775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49691 (or 49686 counting only the distinct ones).

The product of its (nonzero) digits is 2778300, while the sum is 50.

The spelling of 61305376775 in words is "sixty-one billion, three hundred five million, three hundred seventy-six thousand, seven hundred seventy-five".