78618411348541 has 4 divisors (see below), whose sum is σ = 78737349944284. Its totient is φ = 78499472752800.

The previous prime is 78618411348511. The next prime is 78618411348557. The reversal of 78618411348541 is 14584311481687.

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 39912954228900 + 38705457119641 = 6317670^2 + 6221371^2 .

It is a cyclic number.

It is not a de Polignac number, because 78618411348541 - 2⁵ = 78618411348509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78618411348541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78618411348511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59469296880 + ... + 59469298201.

It is an arithmetic number, because the mean of its divisors is an integer number (19684337486071).

Almost surely, 2^{78618411348541} is an apocalyptic number.

It is an amenable number.

78618411348541 is a deficient number, since it is larger than the sum of its proper divisors (118938595743).

78618411348541 is a wasteful number, since it uses less digits than its factorization.

78618411348541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118938595742.

The product of its digits is 20643840, while the sum is 61.

The spelling of 78618411348541 in words is "seventy-eight trillion, six hundred eighteen billion, four hundred eleven million, three hundred forty-eight thousand, five hundred forty-one".