80780545 has 16 divisors (see below), whose sum is σ = 99751680. Its totient is φ = 62769024.

The previous prime is 80780521. The next prime is 80780551. The reversal of 80780545 is 54508708.

It is a cyclic number.

It is not a de Polignac number, because 80780545 - 2⁹ = 80780033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31429 + ... + 33901.

It is an arithmetic number, because the mean of its divisors is an integer number (6234480).

Almost surely, 2^80780545 is an apocalyptic number.

It is an amenable number.

80780545 is a deficient number, since it is larger than the sum of its proper divisors (18971135).

80780545 is a wasteful number, since it uses less digits than its factorization.

80780545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 80780545 is about 8987.7997863771. The cubic root of 80780545 is about 432.2837659665.

It can be divided in two parts, 80 and 780545, that added together give a triangular number (780625 = T₁₂₄₉).

The spelling of 80780545 in words is "eighty million, seven hundred eighty thousand, five hundred forty-five".