77612345 has 8 divisors (see below), whose sum is σ = 93400776. Its totient is φ = 61912576.

The previous prime is 77612333. The next prime is 77612351. The reversal of 77612345 is 54321677.

It can be written as a sum of positive squares in 4 ways, for example, as 5345344 + 72267001 = 2312^2 + 8501^2 .

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 77612345 - 2¹⁴ = 77595961 is a prime.

It is a Duffinian 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, 20222 + ... + 23751.

It is an arithmetic number, because the mean of its divisors is an integer number (11675097).

Almost surely, 2^77612345 is an apocalyptic number.

It is an amenable number.

77612345 is a deficient number, since it is larger than the sum of its proper divisors (15788431).

77612345 is a wasteful number, since it uses less digits than its factorization.

77612345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44331.

The product of its digits is 35280, while the sum is 35.

The square root of 77612345 is about 8809.7868873203. The cubic root of 77612345 is about 426.5568643094.

The spelling of 77612345 in words is "seventy-seven million, six hundred twelve thousand, three hundred forty-five".