77436845 has 8 divisors (see below), whose sum is σ = 92972664. Its totient is φ = 61917184.

The previous prime is 77436839. The next prime is 77436857. The reversal of 77436845 is 54863477.

It can be written as a sum of positive squares in 4 ways, for example, as 29398084 + 48038761 = 5422^2 + 6931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77436845 - 2⁴ = 77436829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77436796 and 77436805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13217 + ... + 18153.

It is an arithmetic number, because the mean of its divisors is an integer number (11621583).

Almost surely, 2^77436845 is an apocalyptic number.

It is an amenable number.

77436845 is a deficient number, since it is larger than the sum of its proper divisors (15535819).

77436845 is a wasteful number, since it uses less digits than its factorization.

77436845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079.

The product of its digits is 564480, while the sum is 44.

The square root of 77436845 is about 8799.8207368105. The cubic root of 77436845 is about 426.2351061035.

The spelling of 77436845 in words is "seventy-seven million, four hundred thirty-six thousand, eight hundred forty-five".