77016985588541 has 4 divisors (see below), whose sum is σ = 81547396505532. Its totient is φ = 72486574671552.

The previous prime is 77016985588511. The next prime is 77016985588619. The reversal of 77016985588541 is 14588558961077.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66599880765625 + 10417104822916 = 8160875^2 + 3227554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77016985588541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77016985588511) 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, 2265205458470 + ... + 2265205458503.

It is an arithmetic number, because the mean of its divisors is an integer number (20386849126383).

Almost surely, 2^{77016985588541} is an apocalyptic number.

It is an amenable number.

77016985588541 is a deficient number, since it is larger than the sum of its proper divisors (4530410916991).

77016985588541 is a wasteful number, since it uses less digits than its factorization.

77016985588541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530410916990.

The product of its (nonzero) digits is 677376000, while the sum is 74.

The spelling of 77016985588541 in words is "seventy-seven trillion, sixteen billion, nine hundred eighty-five million, five hundred eighty-eight thousand, five hundred forty-one".