77763745 has 8 divisors (see below), whose sum is σ = 93431016. Its totient is φ = 62134656.

The previous prime is 77763743. The next prime is 77763767. The reversal of 77763745 is 54736777.

It can be written as a sum of positive squares in 4 ways, for example, as 1096209 + 76667536 = 1047^2 + 8756^2 .

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 77763745 - 2¹ = 77763743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77763695 and 77763704.

It is not an unprimeable number, because it can be changed into a prime (77763743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4852 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (11678877).

Almost surely, 2^77763745 is an apocalyptic number.

It is an amenable number.

77763745 is a deficient number, since it is larger than the sum of its proper divisors (15667271).

77763745 is a wasteful number, since it uses less digits than its factorization.

77763745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19091.

The product of its digits is 864360, while the sum is 46.

The square root of 77763745 is about 8818.3754172750. The cubic root of 77763745 is about 426.8340485715.

The spelling of 77763745 in words is "seventy-seven million, seven hundred sixty-three thousand, seven hundred forty-five".