77576545 has 4 divisors (see below), whose sum is σ = 93091860. Its totient is φ = 62061232.

The previous prime is 77576533. The next prime is 77576561. The reversal of 77576545 is 54567577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54567577 = 1187 ⋅45971.

It can be written as a sum of positive squares in 2 ways, for example, as 55935441 + 21641104 = 7479^2 + 4652^2 .

It is a cyclic number.

It is not a de Polignac number, because 77576545 - 2⁷ = 77576417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77576495 and 77576504.

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, 7757650 + ... + 7757659.

It is an arithmetic number, because the mean of its divisors is an integer number (23272965).

Almost surely, 2^77576545 is an apocalyptic number.

It is an amenable number.

77576545 is a deficient number, since it is larger than the sum of its proper divisors (15515315).

77576545 is a wasteful number, since it uses less digits than its factorization.

77576545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15515314.

The product of its digits is 1029000, while the sum is 46.

The square root of 77576545 is about 8807.7548217466. The cubic root of 77576545 is about 426.4912687125.

The spelling of 77576545 in words is "seventy-seven million, five hundred seventy-six thousand, five hundred forty-five".