77563735061 has 4 divisors (see below), whose sum is σ = 80936071392. Its totient is φ = 74191398732.

The previous prime is 77563735057. The next prime is 77563735079. The reversal of 77563735061 is 16053736577.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16053736577 = 25171 ⋅637787.

It is a cyclic number.

It is not a de Polignac number, because 77563735061 - 2² = 77563735057 is a prime.

It is a super-2 number, since 2×77563735061² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77563732061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686168131 + ... + 1686168176.

It is an arithmetic number, because the mean of its divisors is an integer number (20234017848).

Almost surely, 2^77563735061 is an apocalyptic number.

It is an amenable number.

77563735061 is a deficient number, since it is larger than the sum of its proper divisors (3372336331).

77563735061 is a wasteful number, since it uses less digits than its factorization.

77563735061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372336330.

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

The spelling of 77563735061 in words is "seventy-seven billion, five hundred sixty-three million, seven hundred thirty-five thousand, sixty-one".