77946414605 has 4 divisors (see below), whose sum is σ = 93535697532. Its totient is φ = 62357131680.

The previous prime is 77946414599. The next prime is 77946414613. The reversal of 77946414605 is 50641464977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50641464977 = 29 ⋅1746257413.

It can be written as a sum of positive squares in 2 ways, for example, as 53380867849 + 24565546756 = 231043^2 + 156734^2 .

It is not a de Polignac number, because 77946414605 - 2¹⁸ = 77946152461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7794641456 + ... + 7794641465.

It is an arithmetic number, because the mean of its divisors is an integer number (23383924383).

Almost surely, 2^77946414605 is an apocalyptic number.

It is an amenable number.

77946414605 is a deficient number, since it is larger than the sum of its proper divisors (15589282927).

77946414605 is a wasteful number, since it uses less digits than its factorization.

77946414605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589282926.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 77946414605 in words is "seventy-seven billion, nine hundred forty-six million, four hundred fourteen thousand, six hundred five".